dtc: Trivial lexer cleanups
dtc: Trivial lexer cleanups

This patch applies a couple of tiny cleanups to the lexer.  The
not-very-useful 'WS' named pattern is removed, and the debugging
printf() for single character tokens is moved to the top of the
action, which results in less confusing output when LEXDEBUG is
switched on (because it goes before the printf()s for possible
resulting lexer state changes).

Signed-off-by: David Gibson <aa743a0aaec8f7d7a1f01442503957f4d7a2d634@gibson.dropbear.id.au>

mozilla-b2g/fairphone2_kernel_lk,DooMLoRD/android_bootable_bootloader_lk,zhuotong/mi2_lk_NoEmmc,oubeichen/lk-v500,CanarySolutions/little-kernel,t2m-foxfone/kernel_lk,DooMLoRD/android_bootable_bootloader_lk,Redmi-dev/android_bootable_lk,Foxda-Tech/argo8-bootable-bootloader-lk,RonGokhale/android_lk_bootloader,mozilla-b2g/fairphone2_kernel_lk,utilite2/lk,t2m-foxfone/android_kernel_lk,MiCode/mi2_lk,MiCode/mi2_lk,Blefish/android_bootable_bootloader_lk,thornbirdblue/codeaurora_lk,mozilla-b2g/kernel_lk,Redmi-dev/android_bootable_lk,jbott/lk_gee,chirayudesai/android_bootable_bootloader_lk,jsr-d9/android_kernel_lk,hanjae/lumiab0,detule/lk-g2-spr,M1cha/lktris,oubeichen/lk-v500,M1cha/lktris,oubeichen/lk-v500,pichina/lk,jbott/lk_gee,efidroid/lk,Foxda-Tech/argo8-bootable-bootloader-lk,utilite2/lk,M1cha/android_bootable_bootloader_lk,t2m-foxfone/kernel_lk,Blefish/android_bootable_bootloader_lk,jsr-d9/android_kernel_lk,jsr-d10/android_bootable_bootloader_lk,DooMLoRD/android_bootable_bootloader_lk,oubeichen/lk-v500,t2m-foxfone/kernel_lk,utilite2/lk,RonGokhale/android_lk_bootloader,mozilla-b2g/kernel_lk,t2m-foxfone/android_kernel_lk,Redmi-dev/android_bootable_lk,idor/dk50-bootable_bootloader_lk,Foxda-Tech/polaris-bootable-bootloader-lk,t2m-foxfone/android_kernel_lk,jsr-d10/android_bootable_bootloader_lk,mozilla-b2g/kernel_lk,Foxda-Tech/polaris-bootable-bootloader-lk,mozilla-b2g/fairphone2_kernel_lk,pichina/lk,M1cha/mi2_lk,efidroid/lk,lg-devs/g2-bootloader,Foxda-Tech/polaris-bootable-bootloader-lk,idor/dk50-bootable_bootloader_lk,M1cha/mi2_lk,thornbirdblue/codeaurora_lk,M1cha/lktris,zhuotong/mi2_lk_NoEmmc,oubeichen/lk-v500,M1cha/android_bootable_bootloader_lk,efidroid/lk,M1cha/android_bootable_bootloader_lk,MiCode/mi2_lk,lg-devs/g2-bootloader,M1cha/android_bootable_bootloader_lk,hanjae/lumiab0,Blefish/android_bootable_bootloader_lk,idor/dk50-bootable_bootloader_lk,lg-devs/g2-bootloader,Foxda-Tech/argo8-bootable-bootloader-lk,Foxda-Tech/polaris-bootable-bootloader-lk,Redmi-dev/android_bootable_lk,pichina/lk,Redmi-dev/android_bootable_lk,thornbirdblue/codeaurora_lk,jsr-d10/android_bootable_bootloader_lk,jbott/lk_gee,Foxda-Tech/argo8-bootable-bootloader-lk,RonGokhale/android_lk_bootloader,zhuotong/mi2_lk_NoEmmc,jsr-d9/android_kernel_lk,hanjae/lumiab0,jsr-d9/android_kernel_lk,jbott/lk_gee,detule/lk-g2-spr,jsr-d10/android_bootable_bootloader_lk,Blefish/android_bootable_bootloader_lk,M1cha/mi2_lk,t2m-foxfone/android_kernel_lk,chirayudesai/android_bootable_bootloader_lk,CanarySolutions/little-kernel,MiCode/mi2_lk,zhuotong/mi2_lk_NoEmmc,Blefish/android_bootable_bootloader_lk,idor/dk50-bootable_bootloader_lk,hanjae/lumiab0,hanjae/lumiab0,MiCode/mi2_lk,lg-devs/g2-bootloader,CanarySolutions/little-kernel,jsr-d9/android_kernel_lk,M1cha/android_bootable_bootloader_lk,CanarySolutions/little-kernel,chirayudesai/android_bootable_bootloader_lk,mozilla-b2g/kernel_lk,efidroid/lk,M1cha/mi2_lk,t2m-foxfone/kernel_lk,detule/lk-g2-spr,pichina/lk,chirayudesai/android_bootable_bootloader_lk,utilite2/lk,DooMLoRD/android_bootable_bootloader_lk,RonGokhale/android_lk_bootloader,detule/lk-g2-spr,lg-devs/g2-bootloader,chirayudesai/android_bootable_bootloader_lk,CanarySolutions/little-kernel,M1cha/lktris,efidroid/lk,idor/dk50-bootable_bootloader_lk,jsr-d10/android_bootable_bootloader_lk,mozilla-b2g/fairphone2_kernel_lk,pichina/lk,M1cha/lktris,RonGokhale/android_lk_bootloader,utilite2/lk,detule/lk-g2-spr,M1cha/mi2_lk,mozilla-b2g/fairphone2_kernel_lk,M1cha/android_bootable_bootloader_lk,Foxda-Tech/argo8-bootable-bootloader-lk,t2m-foxfone/kernel_lk,zhuotong/mi2_lk_NoEmmc,thornbirdblue/codeaurora_lk,mozilla-b2g/kernel_lk,DooMLoRD/android_bootable_bootloader_lk,thornbirdblue/codeaurora_lk,jbott/lk_gee,t2m-foxfone/android_kernel_lk,Foxda-Tech/polaris-bootable-bootloader-lk