fix(plat/qemu): (NS_DRAM0_BASE + NS_DRAM0_SIZE) ADDR overflow 32bit

after this commit: If15cf3b9d3e2e7876c40ce888f22e887893fe696
plat/qemu/common/qemu_pm.c:116:	    (entrypoint < (NS_DRAM0_BASE + NS_DRAM0_SIZE)))
the above line (NS_DRAM0_BASE + NS_DRAM0_SIZE) = 0x100000000, which will
overflow 32bit and cause ERROR
SO add ULL to fix it

tested on compiler:
gcc version 10.2.1 20201103 (GNU Toolchain for the A-profile Architecture 10.2-2020.11 (arm-10.16))
Signed-off-by: Darren Liang <lwp513@qq.com>
Change-Id: I1d769b0803142d37bd2968d765ab04a9c7c5c21a

plat/qemu/qemu/include/platform_def.h

@@ -80,8 +80,8 @@
 #define SEC_ROM_BASE			0x00000000
 #define SEC_ROM_SIZE			0x00020000
 
-#define NS_DRAM0_BASE			0x40000000
-#define NS_DRAM0_SIZE			0xc0000000
+#define NS_DRAM0_BASE			ULL(0x40000000)
+#define NS_DRAM0_SIZE			ULL(0xc0000000)
 
 #define SEC_SRAM_BASE			0x0e000000
 #define SEC_SRAM_SIZE			0x00060000