cpu,device/: Remove some __SIMPLE_DEVICE__ and __ROMCC__ use

Change-Id: I62d7450c8e83eec7bf4ad5d0709269a132fd0499
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35649
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/cpu/x86/mtrr/earlymtrr.c

@@ -38,9 +38,6 @@ int get_free_var_mtrr(void)
 	return -1;
 }
 
-#ifdef __ROMCC__
-static
-#endif
 void set_var_mtrr(
 	unsigned int reg, unsigned int base, unsigned int size,
 	unsigned int type)