Replace .align with .balign to avoid ambiguity

Directive .align is arch-dependent, .balign is not.

Change-Id: Ibf2097da29f743f2c87c79d2a88ce1abd0aa6227
diff --git a/libpixelflinger/arch-mips64/col32cb16blend.S b/libpixelflinger/arch-mips64/col32cb16blend.S
index fea4491..5baffb1 100644
--- a/libpixelflinger/arch-mips64/col32cb16blend.S
+++ b/libpixelflinger/arch-mips64/col32cb16blend.S
@@ -53,7 +53,7 @@
     .endm
 
     .text
-    .align
+    .balign 4
 
     .global scanline_col32cb16blend_mips64
     .ent    scanline_col32cb16blend_mips64
diff --git a/libpixelflinger/arch-mips64/t32cb16blend.S b/libpixelflinger/arch-mips64/t32cb16blend.S
index d2f4d49..3cb5f93 100644
--- a/libpixelflinger/arch-mips64/t32cb16blend.S
+++ b/libpixelflinger/arch-mips64/t32cb16blend.S
@@ -75,7 +75,7 @@
     .endm
 
     .text
-    .align
+    .balign 4
 
     .global scanline_t32cb16blend_mips64
     .ent    scanline_t32cb16blend_mips64