Convert CONFIG_SYS_BOOT_GET_{CMDLINE, KBD} to Kconfig

This converts the following to Kconfig:
	CONFIG_SYS_BOOT_GET_CMDLINE
	CONFIG_SYS_BOOT_GET_KBD

Signed-off-by: Derald D. Woods <woods.technical@gmail.com>
diff --git a/arch/Kconfig b/arch/Kconfig
index 762230c..5d57d6d 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -26,6 +26,8 @@
 config M68K
 	bool "M68000 architecture"
 	select HAVE_PRIVATE_LIBGCC
+	select SYS_BOOT_GET_CMDLINE
+	select SYS_BOOT_GET_KBD
 
 config MICROBLAZE
 	bool "MicroBlaze architecture"
@@ -53,6 +55,8 @@
 	bool "PowerPC architecture"
 	select HAVE_PRIVATE_LIBGCC
 	select SUPPORT_OF_CONTROL
+	select SYS_BOOT_GET_CMDLINE
+	select SYS_BOOT_GET_KBD
 
 config RISCV
 	bool "riscv architecture"