m68k: mcf5227x: move CPU type to Kconfig and refactor config.mk

Move the CPU type config options from include/configs/M52277EVB.h
to arch/m68k/Kconfig and refactor the CPU flags select in
arch/m68k/cpu/mcf5227x/config.mk.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Alison Wang <alison.wang@freescale.com>
Cc: Angelo Dureghello <angelo@sysam.it>

arch/m68k/Kconfig

@@ -29,6 +29,9 @@ config MCF5441x
 config MCF5445x
 	bool
 
+config MCF5227x
+	bool
+
 # processor type
 config M5208
 	bool
@@ -87,11 +90,16 @@ config M54455
 	bool
 	select MCF5445x
 
+config M52277
+	bool
+	select MCF5227x
+
 choice
 	prompt "Target select"
 
 config TARGET_M52277EVB
 	bool "Support M52277EVB"
+	select M52277
 
 config TARGET_M5235EVB
 	bool "Support M5235EVB"

arch/m68k/cpu/mcf5227x/config.mk

@@ -7,4 +7,6 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-PLATFORM_CPPFLAGS += -mcpu=52277 -fPIC
+cpuflags-$(CONFIG_M52277) := -mcpu=52277 -fPIC
+
+PLATFORM_CPPFLAGS += $(cpuflags-y)

include/configs/M52277EVB.h

@@ -18,8 +18,6 @@
  * High Level Configuration Options
  * (easy to change)
  */
-#define CONFIG_MCF5227x		/* define processor family */
-#define CONFIG_M52277		/* define processor type */
 #define CONFIG_M52277EVB	/* M52277EVB board */
 
 #define CONFIG_MCFUART