Replace magic numbers in linkerscripts by PAGE_SIZE

When defining different sections in linker scripts it is needed to align
them to multiples of the page size. In most linker scripts this is done
by aligning to the hardcoded value 4096 instead of PAGE_SIZE.

This may be confusing when taking a look at all the codebase, as 4096
is used in some parts that aren't meant to be a multiple of the page
size.

Change-Id: I36c6f461c7782437a58d13d37ec8b822a1663ec1
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/include/plat/arm/common/arm_common.ld.S b/include/plat/arm/common/arm_common.ld.S
index 478b08c..6edfa09 100644
--- a/include/plat/arm/common/arm_common.ld.S
+++ b/include/plat/arm/common/arm_common.ld.S
@@ -6,6 +6,8 @@
 #ifndef __ARM_COMMON_LD_S__
 #define __ARM_COMMON_LD_S__
 
+#include <xlat_tables_defs.h>
+
 MEMORY {
     EL3_SEC_DRAM (rw): ORIGIN = ARM_EL3_TZC_DRAM1_BASE, LENGTH = ARM_EL3_TZC_DRAM1_SIZE
 }
@@ -13,14 +15,14 @@
 SECTIONS
 {
 	. = ARM_EL3_TZC_DRAM1_BASE;
-	ASSERT(. == ALIGN(4096),
+	ASSERT(. == ALIGN(PAGE_SIZE),
 	"ARM_EL3_TZC_DRAM_BASE address is not aligned on a page boundary.")
-	el3_tzc_dram (NOLOAD) : ALIGN(4096) {
+	el3_tzc_dram (NOLOAD) : ALIGN(PAGE_SIZE) {
 	__EL3_SEC_DRAM_START__ = .;
 	*(arm_el3_tzc_dram)
 	__EL3_SEC_DRAM_UNALIGNED_END__ = .;
 
-	. = NEXT(4096);
+	. = NEXT(PAGE_SIZE);
 	__EL3_SEC_DRAM_END__ = .;
 	} >EL3_SEC_DRAM
 }