ARM: remove unnecessary volatile from inline asm

Signed-off-by: Mans Rullgard <mans@mansr.com>

libavcodec/arm/mathops.h

@@ -97,7 +97,7 @@ static inline av_const int MUL16(int ra, int rb)
 static inline av_const int mid_pred(int a, int b, int c)
 {
     int m;
-    __asm__ volatile (
+    __asm__ (
         "mov   %0, %2  \n\t"
         "cmp   %1, %2  \n\t"
         "movgt %0, %1  \n\t"

libavcodec/arm/vp56_arith.h

@@ -31,7 +31,7 @@ static inline int vp56_rac_get_prob_armv6(VP56RangeCoder *c, int pr)
     unsigned high      = c->high << shift;
     unsigned bit;
 
-    __asm__ volatile ("adds    %3,  %3,  %0           \n"
+    __asm__ ("adds    %3,  %3,  %0           \n"
              "cmpcs   %7,  %4                \n"
              "ldrcsh  %2,  [%4], #2          \n"
              "rsb     %0,  %6,  #256         \n"
@@ -63,7 +63,7 @@ static inline int vp56_rac_get_prob_branchy_armv6(VP56RangeCoder *c, int pr)
     unsigned low;
     unsigned tmp;
 
-    __asm__ volatile ("adds    %3,  %3,  %0           \n"
+    __asm__ ("adds    %3,  %3,  %0           \n"
              "cmpcs   %7,  %4                \n"
              "ldrcsh  %2,  [%4], #2          \n"
              "rsb     %0,  %6,  #256         \n"