i2c/quark_se_ss: make structs and functions const and static
i2c/quark_se_ss: make structs and functions const and static

() Make driver API into const, as it is not being modified
   at runtime. Saves 24 bytes of RAM by putting it into ROM.
() Make device config structs as static as they are local to
   the source file, and should not be referenced from outside at all.
() Same goes for the IRQ configuration functions, by declaring them
   static.

Change-Id: I5225dc550bdd65ec88a8930944da063efe16a3b2
Signed-off-by: Daniel Leung <d94e04d205b5962d7873a139ef298b03c1717f72@intel.com>

runchip/zephyr-cc3200,bigdinotech/zephyr,mirzak/zephyr-os,bigdinotech/zephyr,GiulianoFranchetto/zephyr,fractalclone/zephyr-riscv,Vudentz/zephyr,explora26/zephyr,Vudentz/zephyr,punitvara/zephyr,fbsder/zephyr,GiulianoFranchetto/zephyr,fractalclone/zephyr-riscv,nashif/zephyr,explora26/zephyr,sharronliu/zephyr,bboozzoo/zephyr,runchip/zephyr-cc3200,32bitmicro/zephyr,Vudentz/zephyr,fbsder/zephyr,galak/zephyr,punitvara/zephyr,pklazy/zephyr,bboozzoo/zephyr,sharronliu/zephyr,Vudentz/zephyr,galak/zephyr,ldts/zephyr,pklazy/zephyr,ldts/zephyr,32bitmicro/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,rsalveti/zephyr,finikorg/zephyr,mbolivar/zephyr,finikorg/zephyr,rsalveti/zephyr,holtmann/zephyr,tidyjiang8/zephyr-doc,aceofall/zephyr-iotos,aceofall/zephyr-iotos,zephyrproject-rtos/zephyr,holtmann/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,holtmann/zephyr,zephyriot/zephyr,finikorg/zephyr,runchip/zephyr-cc3220,pklazy/zephyr,tidyjiang8/zephyr-doc,erwango/zephyr,bigdinotech/zephyr,finikorg/zephyr,holtmann/zephyr,32bitmicro/zephyr,punitvara/zephyr,fbsder/zephyr,fbsder/zephyr,punitvara/zephyr,bboozzoo/zephyr,ldts/zephyr,kraj/zephyr,fractalclone/zephyr-riscv,rsalveti/zephyr,ldts/zephyr,nashif/zephyr,runchip/zephyr-cc3200,sharronliu/zephyr,rsalveti/zephyr,erwango/zephyr,kraj/zephyr,mirzak/zephyr-os,bigdinotech/zephyr,explora26/zephyr,kraj/zephyr,32bitmicro/zephyr,erwango/zephyr,explora26/zephyr,bboozzoo/zephyr,runchip/zephyr-cc3200,zephyrproject-rtos/zephyr,punitvara/zephyr,galak/zephyr,mbolivar/zephyr,nashif/zephyr,runchip/zephyr-cc3220,mbolivar/zephyr,aceofall/zephyr-iotos,runchip/zephyr-cc3220,zephyriot/zephyr,mirzak/zephyr-os,zephyriot/zephyr,erwango/zephyr,sharronliu/zephyr,mbolivar/zephyr,pklazy/zephyr,aceofall/zephyr-iotos,zephyriot/zephyr,runchip/zephyr-cc3220,nashif/zephyr,mirzak/zephyr-os,zephyriot/zephyr,nashif/zephyr,rsalveti/zephyr,tidyjiang8/zephyr-doc,tidyjiang8/zephyr-doc,32bitmicro/zephyr,bboozzoo/zephyr,erwango/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,galak/zephyr,bigdinotech/zephyr,mirzak/zephyr-os,ldts/zephyr,mbolivar/zephyr,fbsder/zephyr,fractalclone/zephyr-riscv,fractalclone/zephyr-riscv,zephyrproject-rtos/zephyr,galak/zephyr,aceofall/zephyr-iotos,runchip/zephyr-cc3200,Vudentz/zephyr,holtmann/zephyr,kraj/zephyr,pklazy/zephyr,Vudentz/zephyr,tidyjiang8/zephyr-doc,GiulianoFranchetto/zephyr,runchip/zephyr-cc3220,sharronliu/zephyr