Use ALIGN instead of NEXT in linker scripts

Clang linker doesn't support NEXT. As we are not using the MEMORY command
to define discontinuous memory for the output file in any of the linker
scripts, ALIGN and NEXT are equivalent.

Change-Id: I867ffb9c9a76d4e81c9ca7998280b2edf10efea0
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
diff --git a/bl2/bl2.ld.S b/bl2/bl2.ld.S
index 69c22eb..5935a64 100644
--- a/bl2/bl2.ld.S
+++ b/bl2/bl2.ld.S
@@ -28,7 +28,7 @@
         *bl2_entrypoint.o(.text*)
         *(.text*)
         *(.vectors)
-        . = NEXT(PAGE_SIZE);
+        . = ALIGN(PAGE_SIZE);
         __TEXT_END__ = .;
      } >RAM
 
@@ -42,7 +42,7 @@
         KEEP(*(.img_parser_lib_descs))
         __PARSER_LIB_DESCS_END__ = .;
 
-        . = NEXT(PAGE_SIZE);
+        . = ALIGN(PAGE_SIZE);
         __RODATA_END__ = .;
     } >RAM
 #else
@@ -65,7 +65,7 @@
          * read-only, executable.  No RW data from the next section must
          * creep in.  Ensure the rest of the current memory page is unused.
          */
-        . = NEXT(PAGE_SIZE);
+        . = ALIGN(PAGE_SIZE);
         __RO_END__ = .;
     } >RAM
 #endif
@@ -131,7 +131,7 @@
          * as device memory.  No other unexpected data must creep in.
          * Ensure the rest of the current memory page is unused.
          */
-        . = NEXT(PAGE_SIZE);
+        . = ALIGN(PAGE_SIZE);
         __COHERENT_RAM_END__ = .;
     } >RAM
 #endif