Drop ROMCC code and header guards

Change-Id: I730f80afd8aad250f26534435aec24bea75a849c
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37334
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>

src/commonlib/include/commonlib/cbfs_serialized.h

@@ -187,11 +187,6 @@ struct cbfs_file_attr_align {
 	uint32_t alignment;
 } __packed;
 
-/*
- * ROMCC does not understand uint64_t, so we hide future definitions as they are
- * unlikely to be ever needed from ROMCC
- */
-#ifndef __ROMCC__
 
 /*** Component sub-headers ***/
 
@@ -236,6 +231,4 @@ struct cbfs_optionrom {
 	uint32_t len;
 } __packed;
 
-#endif /* __ROMCC__ */
-
 #endif /* _CBFS_SERIALIZED_H_ */

src/commonlib/include/commonlib/helpers.h

@@ -41,13 +41,10 @@
 	var_a op var_b ? var_a : var_b; \
 })
 
-#ifdef __ROMCC__	/* romcc doesn't support __builtin_choose_expr() */
-#define __CMP(a, b, op) __CMP_UNSAFE(a, b, op)
-#else
+
 #define __CMP(a, b, op) __builtin_choose_expr( \
 	__builtin_constant_p(a) && __builtin_constant_p(b), \
 	__CMP_UNSAFE(a, b, op), __CMP_SAFE(a, b, op, __TMPNAME, __TMPNAME))
-#endif
 
 #ifndef MIN
 #define MIN(a, b) __CMP(a, b, <)
@@ -108,12 +105,8 @@
 #define GHz (1000 * MHz)
 
 #ifndef offsetof
-#ifdef __ROMCC__
-#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
-#else
 #define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER)
 #endif
-#endif
 
 #define check_member(structure, member, offset) _Static_assert( \
 	offsetof(struct structure, member) == offset, \