Simplify arch-specific object file lists

Originally committed as revision 22570 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/alpha/Makefile

-OBJS-$(ARCH_ALPHA)                     += alpha/dsputil_alpha.o         \
+OBJS                                   += alpha/dsputil_alpha.o         \
                                           alpha/dsputil_alpha_asm.o     \
                                           alpha/motion_est_alpha.o      \
                                           alpha/motion_est_mvi_asm.o    \

libavcodec/arm/Makefile

-ARM-OBJS-$(CONFIG_H264DSP)             += arm/h264dsp_init_arm.o        \
+OBJS-$(CONFIG_H264DSP)                 += arm/h264dsp_init_arm.o        \
                                           arm/h264pred_init_arm.o       \
 
-OBJS-$(ARCH_ARM)                       += arm/dsputil_init_arm.o        \
+OBJS                                   += arm/dsputil_init_arm.o        \
                                           arm/dsputil_arm.o             \
                                           arm/fft_init_arm.o            \
                                           arm/jrevdct_arm.o             \
                                           arm/mpegvideo_arm.o           \
                                           arm/simple_idct_arm.o         \
-                                          $(ARM-OBJS-yes)
 
 OBJS-$(HAVE_ARMV5TE)                   += arm/dsputil_init_armv5te.o    \
                                           arm/mpegvideo_armv5te.o       \

libavcodec/bfin/Makefile

-OBJS-$(ARCH_BFIN)                      += bfin/dsputil_bfin.o           \
+OBJS                                   += bfin/dsputil_bfin.o           \
                                           bfin/fdct_bfin.o              \
                                           bfin/idct_bfin.o              \
                                           bfin/mpegvideo_bfin.o         \

libavcodec/ppc/Makefile

-OBJS-$(ARCH_PPC)                       += ppc/dsputil_ppc.o             \
+OBJS                                   += ppc/dsputil_ppc.o             \
 
 ALTIVEC-OBJS-$(CONFIG_H264DSP)         += ppc/h264_altivec.o
 ALTIVEC-OBJS-$(CONFIG_VC1_DECODER)     += ppc/vc1dsp_altivec.o

libavcodec/sh4/Makefile

-OBJS-$(ARCH_SH4)                       += sh4/dsputil_align.o           \
+OBJS                                   += sh4/dsputil_align.o           \
                                           sh4/dsputil_sh4.o             \
                                           sh4/idct_sh4.o                \

libavcodec/x86/Makefile

-X86-OBJS-$(CONFIG_MLP_DECODER)         += x86/mlpdsp.o
-X86-OBJS-$(CONFIG_TRUEHD_DECODER)      += x86/mlpdsp.o
-
-OBJS-$(ARCH_X86)                       += $(X86-OBJS-yes)
+OBJS-$(CONFIG_MLP_DECODER)             += x86/mlpdsp.o
+OBJS-$(CONFIG_TRUEHD_DECODER)          += x86/mlpdsp.o
 
 YASM-OBJS-FFT-$(HAVE_AMD3DNOW)         += x86/fft_3dn.o
 YASM-OBJS-FFT-$(HAVE_AMD3DNOWEXT)      += x86/fft_3dn2.o