igzip: Fix aarch64 registry width for bfinal

We only ever load 32 bits into it, and we only ever want to compare against
32 bits. There was no need to declare it as 64 bits.

Furthermore, there were cases where a 64 bit comparison around
isal_out_overflow_1 led us to erroneously set the block state to
ISAL_BLOCK_INPUT_DONE when it should have been left at ISAL_BLOCK_NEW_HDR.

Fixes #316

Signed-off-by: Tim Burke <[email protected]>

Author: tipabu

igzip/aarch64/igzip_decode_huffman_code_block_aarch64.S

@@ -292,7 +292,7 @@ declare Macros
 	declare_generic_reg	block_state,	8,w
 	declare_generic_reg	block_state_adr,9,x
 	declare_generic_reg	look_back_dist,	10,w
-	declare_generic_reg	bfinal,		22,x
+	declare_generic_reg	bfinal,		22,w
 
 	declare_generic_reg	next_out,	12,x
 	declare_generic_reg	avail_out,	13,w
@@ -607,8 +607,8 @@ next_lit_eq_256:
 				ISAL_BLOCK_INPUT_DONE : ISAL_BLOCK_NEW_HDR;
 	*/
 	mov	block_state, ISAL_BLOCK_INPUT_DONE
-	cmp	w_bfinal,0
-	csel	block_state, block_state, w_bfinal, ne
+	cmp	bfinal,0
+	csel	block_state, block_state, bfinal, ne
 	str	block_state, [block_state_adr]
 
 	b	block_state_loop