bpf: Merge two CONFIG_BPF entries

'config BPF' exists in both init/Kconfig and kernel/bpf/Kconfig.

Commit b24abcff91 ("bpf, kconfig: Add consolidated menu entry for bpf
with core options") added the second one to kernel/bpf/Kconfig instead
of moving the existing one.

Merge them together.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/bpf/20240204075634.32969-1-masahiroy@kernel.org

init/Kconfig

@@ -1457,11 +1457,6 @@ config SYSCTL_ARCH_UNALIGN_ALLOW
 config HAVE_PCSPKR_PLATFORM
 	bool
 
-# interpreter that classic socket filters depend on
-config BPF
-	bool
-	select CRYPTO_LIB_SHA1
-
 menuconfig EXPERT
 	bool "Configure standard kernel features (expert users)"
 	# Unhide debug options, to make the on-by-default options visible

kernel/bpf/Kconfig

@@ -3,6 +3,7 @@
 # BPF interpreter that, for example, classic socket filters depend on.
 config BPF
 	bool
+	select CRYPTO_LIB_SHA1
 
 # Used by archs to tell that they support BPF JIT compiler plus which
 # flavour. Only one of the two can be selected for a specific arch since