sh: fix kconfig unmet dependency warning for FRAME_POINTER

FRAME_POINTER depends on DEBUG_KERNEL so DWARF_UNWINDER should
depend on DEBUG_KERNEL before selecting FRAME_POINTER.

WARNING: unmet direct dependencies detected for FRAME_POINTER
  Depends on [n]: DEBUG_KERNEL [=n] && (M68K || UML || SUPERH [=y]) || ARCH_WANT_FRAME_POINTERS [=n]
  Selected by [y]:
  - DWARF_UNWINDER [=y]

Fixes: bd35386 ("sh: dwarf unwinder support.")
Signed-off-by: Randy Dunlap <[email protected]>
Cc: Matt Fleming <[email protected]>
Cc: Matt Fleming <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Cc: John Paul Adrian Glaubitz <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Tested-by: John Paul Adrian Glaubitz <[email protected]>
Signed-off-by: Rich Felker <[email protected]>

Author: rddunlap

arch/sh/Kconfig.debug

@@ -54,6 +54,7 @@ config DUMP_CODE
 
 config DWARF_UNWINDER
 	bool "Enable the DWARF unwinder for stacktraces"
+	depends on DEBUG_KERNEL
 	select FRAME_POINTER
 	default n
 	help