libutils: util.h: fix the GENMASK_32(h, l) macro

The macro has a problem when it is used in an assembly file:
.e.g ".word GENMASK_32(15, 8)" will be compiled to ".word 0xffffff00"

The issue is caused by the compiler shift right a 64-bit ~0 instead of
a 32-bit ~0. Fix it by using shift left.

Signed-off-by: Tony Han <tony.han@microchip.com>

lib/libutils/ext/include/util.h

@@ -135,7 +135,7 @@
  * GENMASK_64(39, 21) gives us the 64bit vector 0x000000ffffe00000.
  */
 #define GENMASK_32(h, l) \
-	(((~UINT32_C(0)) << (l)) & (~UINT32_C(0) >> (32 - 1 - (h))))
+	(((~UINT32_C(0)) << (l)) & ~((~UINT32_C(0) << 1) << (h)))
 
 #define GENMASK_64(h, l) \
 	(((~UINT64_C(0)) << (l)) & (~UINT64_C(0) >> (64 - 1 - (h))))