Align end of bss by 4 bytes

Most of the bss initialization loop increments 4 bytes
at a time. And the loop end is checked for an 'equal'
condition. Make the bss end address aligned by 4, so
that the loop will end as expected.

Signed-off-by: Selvamuthukumar <selva.muthukumar@e-coninfotech.com>
Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/sandburst/karef/u-boot.lds b/board/sandburst/karef/u-boot.lds
index 2439adb..6223f4e 100644
--- a/board/sandburst/karef/u-boot.lds
+++ b/board/sandburst/karef/u-boot.lds
@@ -152,6 +152,7 @@
    *(.dynbss)
    *(.bss)
    *(COMMON)
+   . = ALIGN(4);
   }
   _end = . ;
   PROVIDE (end = .);