mips, bpf: Fix reference to non-existing Kconfig symbol

The Kconfig symbol for R10000 ll/sc errata workaround in the MIPS JIT was
misspelled, causing the workaround to not take effect when enabled.

Fixes: 72570224bb8f ("mips, bpf: Add JIT workarounds for CPU errata")
Reported-by: Lukas Bulwahn <[e-mail]>
Signed-off-by: Johan Almbladh <[e-mail]>
Signed-off-by: Daniel Borkmann <[e-mail]>
Link: https://lore.kernel.org/bpf/[e-mail]

arch/mips/net/bpf_jit_comp.h

···
 #define emit(...) __emit(__VA_ARGS__)
 
 /* Workaround for R10000 ll/sc errata */
-#ifdef CONFIG_WAR_R10000
+#ifdef CONFIG_WAR_R10000_LLSC
 #define LLSC_beqz	beqzl
 #else
 #define LLSC_beqz	beqz