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/arch/x86/include/arch/cpu.h

@@ -214,7 +214,8 @@ static inline bool cpu_is_intel(void)
 	return CONFIG(CPU_INTEL_COMMON) || CONFIG(SOC_INTEL_COMMON);
 }
 
-#ifndef __SIMPLE_DEVICE__
+#ifndef __ROMCC__
+/* romcc does not support anonymous structs. */
 
 struct device;
 
@@ -258,9 +259,8 @@ static inline struct cpu_info *cpu_info(void)
 	);
 	return ci;
 }
-#endif
 
-#ifndef __ROMCC__ // romcc is segfaulting in some cases
+/* romcc is segfaulting in some cases. */
 struct cpuinfo_x86 {
 	uint8_t	x86;		/* CPU family */
 	uint8_t	x86_vendor;	/* CPU vendor */