ARM: omap4: Provide do_wfi() for Thumb-2
ARM: omap4: Provide do_wfi() for Thumb-2

For CONFIG_THUMB2_KERNEL, the existing definition of do_wfi() will
insert invalid code into the instruction stream.

Any assembler which can assemble Thumb-2 is guaranteed to accept
the "wfi" mnemonic, so for the Thumb-2 case, just use the mnemonic.

The ARM case is left as-is.

Signed-off-by: Dave Martin <00bf0f20509cb3bd3255c624dba0f295e3c4128e@linaro.org>
Signed-off-by: Kevin Hilman <f9849b02abe18c1ece6bd40346458ed53f49d31b@ti.com>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs