Remove Unnecessary/Erroneous Reads In sgemm_tcopy_16.S COPY1x8 Macro

There appears to have been some code leak when copying from the COPY2x8
macro above where we're reading 8 bytes into d4-d7 directly after
reading 4 bytes into s4-s7. These 32 bytes in d4-7 are unused and can
possibly overrun the boundary of allocated memory -- Valgrind detected
this which is what dragged my attention to it for a 128,1 copy.

Additionally, there is no need to update the addresses stored in A0-A7
as the only possible paths after running this macro will overwrite A0-7
if looping to the next 8 rows, or overwrite A0-3 if moving to 4 rows --
in which case A4-7 are unused.

kernel/arm64/sgemm_tcopy_16.S

@@ -271,11 +271,6 @@ All rights reserved.
 	ldr	s2, [A03]
 	ldr	s3, [A04]
 
-	add	A01, A01, #4
-	add	A02, A02, #4
-	add	A03, A03, #4
-	add	A04, A04, #4
-
 	stp	s0, s1, [B04]
 	add	B04, B04, #8
 	stp	s2, s3, [B04]
@@ -286,11 +281,6 @@ All rights reserved.
 	ldr	s6, [A07]
 	ldr	s7, [A08]
 
-	ldr	d4, [A05], #8
-	ldr	d5, [A06], #8
-	ldr	d6, [A07], #8
-	ldr	d7, [A08], #8
-
 	stp	s4, s5, [B04]
 	add	B04, B04, #8
 	stp	s6, s7, [B04]