LoongArch: BPF: Remove duplicated flags check

The check for (BPF_TRAMP_F_ORIG_STACK | BPF_TRAMP_F_SHARE_IPMODIFY)
is duplicated in __arch_prepare_bpf_trampoline(). Remove it.

Acked-by: Tiezhu Yang <[email protected]>
Tested-by: Vincent Li <[email protected]>
Signed-off-by: Hengqi Chen <[email protected]>

Author: chenhengqi

arch/loongarch/net/bpf_jit.c

@@ -1462,9 +1462,6 @@ static int __arch_prepare_bpf_trampoline(struct jit_ctx *ctx, struct bpf_tramp_i
 	struct bpf_tramp_links *fmod_ret = &tlinks[BPF_TRAMP_MODIFY_RETURN];
 	u32 **branches = NULL;
 
-	if (flags & (BPF_TRAMP_F_ORIG_STACK | BPF_TRAMP_F_SHARE_IPMODIFY))
-		return -ENOTSUPP;
-
 	/*
 	 * FP + 8       [ RA to parent func ] return address to parent
 	 *                    function