arch/Config.in.m68k: Add an option for 68030

Buildroot is probably the only thing lightweight enough to run on
68030 machines in the current day.

Add a CPU option for the 68030.

Tested on a Motorola MVME147.

Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

arch/Config.in.m68k

@@ -23,6 +23,11 @@ choice
 	help
 	  Specific CPU variant to use
 
+config BR2_m68k_68030
+	bool "68030"
+	select BR2_m68k_m68k
+	select BR2_USE_MMU
+
 config BR2_m68k_68040
 	bool "68040"
 	select BR2_m68k_m68k
@@ -36,6 +41,7 @@ config BR2_m68k_cf5208
 endchoice
 
 config BR2_GCC_TARGET_CPU
+	default "68030"		if BR2_m68k_68030
 	default "68040"		if BR2_m68k_68040
 	default "5208"		if BR2_m68k_cf5208