Remove --enable-gprof flag

gprof is far too intrusive to be of use as a profile for ffmpeg,
and it fails to build in many configurations.  Oprofile is a
better tool for profiling on Linux.

Originally committed as revision 23807 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/alpha/dsputil_alpha_asm.S

@@ -53,11 +53,6 @@ put_pixels_axp_asm:
         .frame sp, 0, ra
         .prologue 0
 
-#if CONFIG_GPROF
-        lda     AT, _mcount
-        jsr     AT, (AT), _mcount
-#endif
-
         and     a1, 7, t0
         beq     t0, $aligned
 
@@ -150,11 +145,6 @@ put_pixels_clamped_mvi_asm:
         .frame sp, 0, ra
         .prologue 0
 
-#if CONFIG_GPROF
-        lda     AT, _mcount
-        jsr     AT, (AT), _mcount
-#endif
-
         lda     t8, -1
         lda     t9, 8           # loop counter
         zap     t8, 0xaa, t8    # 00ff00ff00ff00ff
@@ -205,11 +195,6 @@ add_pixels_clamped_mvi_asm:
         .frame sp, 0, ra
         .prologue 0
 
-#if CONFIG_GPROF
-        lda     AT, _mcount
-        jsr     AT, (AT), _mcount
-#endif
-
         lda     t1, -1
         lda     th, 8
         zap     t1, 0x33, tg

libavcodec/alpha/motion_est_mvi_asm.S

@@ -55,11 +55,6 @@ pix_abs16x16_mvi_asm:
         .frame sp, 0, ra, 0
         .prologue 0
 
-#if CONFIG_GPROF
-        lda     AT, _mcount
-        jsr     AT, (AT), _mcount
-#endif
-
         and     a2, 7, t0
         clr     v0
         beq     t0, $aligned