neon: disable asm quantizer

The assembly version of the quantizer has not been updated to match
the new exact quantizer introduced in commit e04e2935. That commit tried
to disable this code but missed the non-RTCD case.

Thanks to David Baker <david.baker at openmarket.com> for isolating the
issue and testing this fix.

Change-Id: I0e51492dc6f8e44d2c10b587427448bf94135c65

vp8/encoder/arm/csystemdependent.c

@@ -63,6 +63,10 @@ void vp8_cmachine_specific_config(VP8_COMP *cpi)
     cpi->rtcd.encodemb.submbuv               = vp8_subtract_mbuv_neon;
 
     cpi->rtcd.quantize.quantb                = vp8_regular_quantize_b;
+    cpi->rtcd.quantize.fastquantb            = vp8_fast_quantize_b_c;
+    /* The neon quantizer has not been updated to match the new exact
+     * quantizer introduced in commit e04e2935
+     */
     /*cpi->rtcd.quantize.fastquantb            = vp8_fast_quantize_b_neon;*/
 #elif HAVE_ARMV6
     cpi->rtcd.variance.sad16x16              = vp8_sad16x16_c;

vp8/encoder/arm/quantize_arm.h

@@ -15,8 +15,11 @@
 #if HAVE_ARMV7
 extern prototype_quantize_block(vp8_fast_quantize_b_neon);
 
-#undef  vp8_quantize_fastquantb
-#define vp8_quantize_fastquantb vp8_fast_quantize_b_neon
+/* The neon quantizer has not been updated to match the new exact
+ * quantizer introduced in commit e04e2935
+ */
+//#undef  vp8_quantize_fastquantb
+//#define vp8_quantize_fastquantb vp8_fast_quantize_b_neon
 
 #endif