riscv, bpf: Fix patch_text implicit declaration

bpf_jit_comp64.c uses patch_text(), so add <asm/patch.h> to it
to prevent the build error:

../arch/riscv/net/bpf_jit_comp64.c: In function 'bpf_arch_text_poke':
../arch/riscv/net/bpf_jit_comp64.c:691:23: error: implicit declaration of function 'patch_text'; did you mean 'path_get'? [-Werror=implicit-function-declaration]
  691 |                 ret = patch_text(ip, new_insns, ninsns);
      |                       ^~~~~~~~~~

Fixes: 596f2e6 ("riscv, bpf: Add bpf_arch_text_poke support for RV64")
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Randy Dunlap <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Acked-by: Pu Lehui <[email protected]>
Acked-by: Björn Töpel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Link: https://lore.kernel.org/bpf/[email protected]

Author: rddunlap

arch/riscv/net/bpf_jit_comp64.c

@@ -10,6 +10,7 @@
 #include <linux/filter.h>
 #include <linux/memory.h>
 #include <linux/stop_machine.h>
+#include <asm/patch.h>
 #include "bpf_jit.h"
 
 #define RV_REG_TCC RV_REG_A6