fix(versal): use correct macro name for ocm base address

In absence of definition, PLAT_OCM_BASE is always 0
and IS_TFA_IN_OCM(x) always returns true irrespective
of address passed to it. Reasoning is as mentioned in
Refer section 4.2.3 in
https://gcc.gnu.org/onlinedocs/gcc-3.0.2/cpp_4.html
Due to this,functionality for reservation of TF-A DDR memory in
dtb is never executed.

Signed-off-by: Amit Nagal <amit.nagal@amd.com>
Change-Id: Iafb6b7c6aec29bba22f8f7a8395f9caf97548157
diff --git a/plat/xilinx/versal/include/platform_def.h b/plat/xilinx/versal/include/platform_def.h
index 4c0df4f..4c02402 100644
--- a/plat/xilinx/versal/include/platform_def.h
+++ b/plat/xilinx/versal/include/platform_def.h
@@ -79,7 +79,7 @@
 
 #define XILINX_OF_BOARD_DTB_MAX_SIZE	U(0x200000)
 
-#define PLAT_OCM_BSE			U(0xFFFE0000)
+#define PLAT_OCM_BASE			U(0xFFFE0000)
 #define PLAT_OCM_LIMIT			U(0xFFFFFFFF)
 
 #define IS_TFA_IN_OCM(x)	((x >= PLAT_OCM_BASE) && (x < PLAT_OCM_LIMIT))