m68k: Kconfig.cpu: Fix indentation and add endif comments

The convention for indentation seems to be a single tab. Help text is
further indented by an additional two whitespaces. Fix the lines that
violate these rules.

While at it, add missing trailing endif comments and squeeze multiple
empty lines.
Signed-off-by: NJuerg Haefliger <juergh@canonical.com>
Link: https://lore.kernel.org/r/20220524075848.21684-2-juergh@canonical.comSigned-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/Kconfig.cpu

@@ -155,7 +155,7 @@ config M520x
 	select COLDFIRE_PIT_TIMER
 	select HAVE_CACHE_SPLIT
 	help
-	   Freescale Coldfire 5207/5208 processor support.
+	  Freescale Coldfire 5207/5208 processor support.
 
 config M523x
 	bool "MCF523x"
@@ -322,7 +322,6 @@ config COLDFIRE_SLTIMERS
 
 endif # COLDFIRE
 
-
 comment "Processor Specific Options"
 
 config M68KFPU_EMU
@@ -522,7 +521,7 @@ config CACHE_BOTH
 	  Split the ColdFire CPU cache, and use half as an instruction cache
 	  and half as a data cache.
 endchoice
-endif
+endif # HAVE_CACHE_SPLIT
 
 if HAVE_CACHE_CB
 choice
@@ -539,4 +538,4 @@ config CACHE_COPYBACK
 	help
 	  The ColdFire CPU cache is set into Copy-back mode.
 endchoice
-endif
+endif # HAVE_CACHE_CB