bpf: remove CONFIG_BPF_JIT dependency on CONFIG_MODULES of

BPF just-in-time compiler depended on CONFIG_MODULES because it used
module_alloc() to allocate memory for the generated code.

Since code allocations are now implemented with execmem, drop dependency of
CONFIG_BPF_JIT on CONFIG_MODULES and make it select CONFIG_EXECMEM.

Suggested-by: Björn Töpel <bjorn@kernel.org>
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>

kernel/bpf/Kconfig

diff --git a/kernel/bpf/Kconfig b/kernel/bpf/Kconfig
index bc25f50..f999e4e 100644
--- a/kernel/bpf/Kconfig
+++ b/kernel/bpf/Kconfig
@@ -43,7 +43,7 @@
 	bool "Enable BPF Just In Time compiler"
 	depends on BPF
 	depends on HAVE_CBPF_JIT || HAVE_EBPF_JIT
-	depends on MODULES
+	select EXECMEM
 	help
 	  BPF programs are normally handled by a BPF interpreter. This option
 	  allows the kernel to generate native code when a program is loaded