hexagon: select FRAME_POINTER instead of redefining it

Because FRAME_POINTER is defined in lib/Kconfig.debug, the arch Kconfig
should select it.

Add 'select FRAME_POINTER' to HEXAGON. ARCH_WANT_FRAME_POINTERS must
also be selected to avoid the unmet dependency warning.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Brian Cain <bcain@quicinc.com>

arch/hexagon/Kconfig

@@ -7,7 +7,9 @@ config HEXAGON
 	select ARCH_32BIT_OFF_T
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 	select ARCH_NO_PREEMPT
+	select ARCH_WANT_FRAME_POINTERS
 	select DMA_GLOBAL_POOL
+	select FRAME_POINTER
 	# Other pending projects/to-do items.
 	# select HAVE_REGS_AND_STACK_ACCESS_API
 	# select HAVE_HW_BREAKPOINT if PERF_EVENTS
@@ -43,9 +45,6 @@ config HEXAGON_PHYS_OFFSET
 	help
 	  Platforms that don't load the kernel at zero set this.
 
-config FRAME_POINTER
-	def_bool y
-
 config LOCKDEP_SUPPORT
 	def_bool y