build: add option KERNEL_DEBUG_INFO_BTF_MODULES

The recent kernel v6.6.31 update broke BTF-enabled builds since upstream
Linux added a prompt for config option DEBUG_INFO_BTF_MODULES in commit
2166cb2e21 ("bpf, kconfig: Fix DEBUG_INFO_BTF_MODULES Kconfig definition").

Fix by updating Config-kernel.in to add the option, cleaning up a related
dependency and whitespace also.

Fixes: 10d77b9 ("kernel: bump 6.6 to 6.6.31")
Signed-off-by: Tony Ambardar <itugrok@yahoo.com>

config/Config-kernel.in

@@ -435,7 +435,6 @@ config KERNEL_DEBUG_INFO
 	  This will compile your kernel and modules with debug information.
 
 config KERNEL_DEBUG_INFO_BTF
-
 	bool "Enable additional BTF type information"
 	depends on !HOST_OS_MACOS
 	depends on KERNEL_DEBUG_INFO && !KERNEL_DEBUG_INFO_REDUCED
@@ -447,9 +446,13 @@ config KERNEL_DEBUG_INFO_BTF
 
 	  Required to run BPF CO-RE applications.
 
+config KERNEL_DEBUG_INFO_BTF_MODULES
+	def_bool y
+	depends on KERNEL_DEBUG_INFO_BTF
+
 config KERNEL_MODULE_ALLOW_BTF_MISMATCH
 	bool "Allow loading modules with non-matching BTF type info"
-	depends on KERNEL_DEBUG_INFO_BTF
+	depends on KERNEL_DEBUG_INFO_BTF_MODULES
 	help
 	  For modules whose split BTF does not match vmlinux, load without
 	  BTF rather than refusing to load. The default behavior with