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/bl1/bl1.ld.S b/bl1/bl1.ld.S
index 26c0ae4..484787d 100644
--- a/bl1/bl1.ld.S
+++ b/bl1/bl1.ld.S
@@ -28,7 +28,7 @@
         *bl1_entrypoint.o(.text*)
         *(.text*)
         *(.vectors)
-        . = NEXT(PAGE_SIZE);
+        . = ALIGN(PAGE_SIZE);
         __TEXT_END__ = .;
      } >ROM
 
@@ -152,7 +152,7 @@
          * 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