utils_def: add an assembly version for GENMASK

When compiling assembly files, stdint.h is not included.
UINT32_C and UINT64_C are then not defined.
A new GENMASK macro for assembly is then created.
Signed-off-by: Yann Gautier <yann.gautier@st.com>

include/lib/utils_def.h

@@ -30,11 +30,19 @@
  * position @h. For example
  * GENMASK_64(39, 21) gives us the 64bit vector 0x000000ffffe00000.
  */
+#if defined(__LINKER__) || defined(__ASSEMBLY__)
+#define GENMASK_32(h, l) \
+	(((0xFFFFFFFF) << (l)) & (0xFFFFFFFF >> (32 - 1 - (h))))
+
+#define GENMASK_64(h, l) \
+	((~0 << (l)) & (~0 >> (64 - 1 - (h))))
+#else
 #define GENMASK_32(h, l) \
 	(((~UINT32_C(0)) << (l)) & (~UINT32_C(0) >> (32 - 1 - (h))))
 
 #define GENMASK_64(h, l) \
 	(((~UINT64_C(0)) << (l)) & (~UINT64_C(0) >> (64 - 1 - (h))))
+#endif
 
 #ifdef AARCH32
 #define GENMASK				GENMASK_32