m68knommu: Replace deprecated strcpy with strscpy in init_ucsimm

strcpy() has been deprecated [1] because it performs no bounds checking
on the destination buffer, which can lead to buffer overflows. Replace
it with the safer strscpy().

Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1]
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Greg Ungerer <gerg@kernel.org>

Author: toblux

arch/m68k/68000/ucsimm.c

@@ -9,6 +9,7 @@
  * for more details.
  */
 #include <linux/init.h>
+#include <linux/string.h>
 #include <asm/bootstd.h>
 #include <asm/machdep.h>
 #include <asm/MC68VZ328.h>
@@ -31,7 +32,7 @@ void __init init_ucsimm(char *command, int size)
 	pr_info("uCsimm/uCdimm hwaddr %pM\n", p);
 	p = getbenv("APPEND");
 	if (p)
-		strcpy(p, command);
+		strscpy(p, command, size);
 	else
 		command[0] = 0;
 }