asm: assembly code for intra_pred_planar[32x32]
rename to avoid 10bpp conflict

--HG--
rename : source/common/x86/intrapred.asm => source/common/x86/intrapred8.asm
asm: code for pixel_sse_sp_12x16
asm: code for pixel_sse_sp_4xN
asm: cleanups for pixel_sse_sp
pixel: remove sse_sp intrinsic primitives, we have asm coverage
testbench: added cvt16to32_shl primitive function
cleanup: remove unused cvt16to16_shl_t
asm: assembly code for cvt16to32_shl
asm : Adding asm routine for dst4.
asm: enabled asm routines for HIGH_BIT_DEPTH, which has the support for 16bpp
size based array for intra_pred_ang[]
asm : Adding asm routine for idst4
Enable idst4 asm
10bpp: asm code for pixel_var_32x32 and 64x64
asm: plumb out more 16bpp asm setup infrastructure
intrapred: use square block defines, do not instantiate intra 64x64
intrapred: fix func decl of intra-ang C ref
vec: remove two DCT intrinsic primitives with asm coverage
intra: testbench fixups after dropping 64x64 C refs