arm: mc: neon: Use vld with ! post-increment instead of a register in...

arm: mc: neon: Use vld with ! post-increment instead of a register in blend/blend_h/blend_v function

	                        A73		A53
	                Current	Earlier	Current	Earlier
blend_h_w2_8bpc_neon:	74.1	74.6	137.5	137
blend_h_w4_8bpc_neon:	65.8	66	147.1	146.6
blend_h_w8_8bpc_neon:	68.7	68.6	131.7	131.2
blend_h_w16_8bpc_neon:	85.6	85.9	190.4	192
blend_h_w32_8bpc_neon:	149.8	149.8	358.3	357.6
blend_h_w64_8bpc_neon:	264.1	262.8	630.3	629.5
blend_h_w128_8bpc_neon:	575.4	577	1404.2	1402
blend_v_w2_8bpc_neon:	120.1	121.3	196.4	195.5
blend_v_w4_8bpc_neon:	247.2	247.5	358.4	358.5
blend_v_w8_8bpc_neon:	204.2	205.2	358.4	358.5
blend_v_w16_8bpc_neon:	238.5	237.1	591.8	590.5
blend_v_w32_8bpc_neon:	347.2	345.8	997.2	994.1
blend_w4_8bpc_neon:	38.3	38.6	98.7	99.2
blend_w8_8bpc_neon:	54.8	55.1	125.3	125.8
blend_w16_8bpc_neon:	150.8	150.1	334.5	344
blend_w32_8bpc_neon:	361.6	360.4	910.7	910.9