m68k: support configure time command line for MMU m68k

The non-MMU builds of m68k allow a fixed kernel boot command line to
be configured at configure time. Allow this MMU builds as well.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>

arch/m68k/Kconfig.debug

@@ -2,6 +2,14 @@ menu "Kernel hacking"
 
 source "lib/Kconfig.debug"
 
+config BOOTPARAM
+	bool 'Compiled-in Kernel Boot Parameter'
+
+config BOOTPARAM_STRING
+	string 'Kernel Boot Parameter'
+	default 'console=ttyS0,19200'
+	depends on BOOTPARAM
+
 if !MMU
 
 config FULLDEBUG
@@ -15,14 +23,6 @@ config HIGHPROFILE
 	help
 	  Use a fast secondary clock to produce profiling information.
 
-config BOOTPARAM
-	bool 'Compiled-in Kernel Boot Parameter'
-
-config BOOTPARAM_STRING
-	string 'Kernel Boot Parameter'
-	default 'console=ttyS0,19200'
-	depends on BOOTPARAM
-
 config NO_KERNEL_MSG
 	bool "Suppress Kernel BUG Messages"
 	help

arch/m68k/kernel/setup_mm.c

@@ -258,6 +258,10 @@ void __init setup_arch(char **cmdline_p)
 	init_mm.end_data = (unsigned long)_edata;
 	init_mm.brk = (unsigned long)_end;
 
+#if defined(CONFIG_BOOTPARAM)
+	strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
+	m68k_command_line[CL_SIZE - 1] = 0;
+#endif /* CONFIG_BOOTPARAM */
 	*cmdline_p = m68k_command_line;
 	memcpy(boot_command_line, *cmdline_p, CL_SIZE);