riscv: jump_label: Simplify assembly syntax

The idiomatic way to write "jal zero" is "j".

Reviewed-by: Björn Töpel <[email protected]>
Signed-off-by: Samuel Holland <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>

Author: SiFiveHolland

arch/riscv/include/asm/jump_label.h

@@ -46,7 +46,7 @@ static __always_inline bool arch_static_branch_jump(struct static_key * const ke
 		"	.option push				\n\t"
 		"	.option norelax				\n\t"
 		"	.option norvc				\n\t"
-		"1:	jal		zero, %l[label]		\n\t"
+		"1:	j		%l[label]		\n\t"
 		"	.option pop				\n\t"
 		"	.pushsection	__jump_table, \"aw\"	\n\t"
 		"	.align		" RISCV_LGPTR "		\n\t"