LoongArch: Simplify "BLT foo, zero" with BLTZ

Support for the syntactic sugar is present in upstream binutils port
from the beginning. Use it for shorter lines and better consistency.
Generated code should be identical.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

arch/loongarch/include/asm/atomic.h

@@ -158,7 +158,7 @@ static inline int arch_atomic_sub_if_positive(int i, atomic_t *v)
 		"1:	ll.w	%1, %2		# atomic_sub_if_positive\n"
 		"	addi.w	%0, %1, %3				\n"
 		"	move	%1, %0					\n"
-		"	blt	%0, $zero, 2f				\n"
+		"	bltz	%0, 2f					\n"
 		"	sc.w	%1, %2					\n"
 		"	beqz	%1, 1b					\n"
 		"2:							\n"
@@ -171,7 +171,7 @@ static inline int arch_atomic_sub_if_positive(int i, atomic_t *v)
 		"1:	ll.w	%1, %2		# atomic_sub_if_positive\n"
 		"	sub.w	%0, %1, %3				\n"
 		"	move	%1, %0					\n"
-		"	blt	%0, $zero, 2f				\n"
+		"	bltz	%0, 2f					\n"
 		"	sc.w	%1, %2					\n"
 		"	beqz	%1, 1b					\n"
 		"2:							\n"
@@ -321,7 +321,7 @@ static inline long arch_atomic64_sub_if_positive(long i, atomic64_t *v)
 		"1:	ll.d	%1, %2	# atomic64_sub_if_positive	\n"
 		"	addi.d	%0, %1, %3				\n"
 		"	move	%1, %0					\n"
-		"	blt	%0, $zero, 2f				\n"
+		"	bltz	%0, 2f					\n"
 		"	sc.d	%1, %2					\n"
 		"	beqz	%1, 1b					\n"
 		"2:							\n"
@@ -334,7 +334,7 @@ static inline long arch_atomic64_sub_if_positive(long i, atomic64_t *v)
 		"1:	ll.d	%1, %2	# atomic64_sub_if_positive	\n"
 		"	sub.d	%0, %1, %3				\n"
 		"	move	%1, %0					\n"
-		"	blt	%0, $zero, 2f				\n"
+		"	bltz	%0, 2f					\n"
 		"	sc.d	%1, %2					\n"
 		"	beqz	%1, 1b					\n"
 		"2:							\n"

arch/loongarch/mm/tlbex.S

@@ -47,7 +47,7 @@ SYM_FUNC_START(handle_tlb_load)
 	 * The vmalloc handling is not in the hotpath.
 	 */
 	csrrd	t0, LOONGARCH_CSR_BADV
-	blt	t0, zero, vmalloc_load
+	bltz	t0, vmalloc_load
 	csrrd	t1, LOONGARCH_CSR_PGDL
 
 vmalloc_done_load:
@@ -210,7 +210,7 @@ SYM_FUNC_START(handle_tlb_store)
 	 * The vmalloc handling is not in the hotpath.
 	 */
 	csrrd	t0, LOONGARCH_CSR_BADV
-	blt	t0, zero, vmalloc_store
+	bltz	t0, vmalloc_store
 	csrrd	t1, LOONGARCH_CSR_PGDL
 
 vmalloc_done_store:
@@ -378,7 +378,7 @@ SYM_FUNC_START(handle_tlb_modify)
 	 * The vmalloc handling is not in the hotpath.
 	 */
 	csrrd	t0, LOONGARCH_CSR_BADV
-	blt	t0, zero, vmalloc_modify
+	bltz	t0, vmalloc_modify
 	csrrd	t1, LOONGARCH_CSR_PGDL
 
 vmalloc_done_modify: