powerpc: Merge xmon

The merged version follows the ppc64 version pretty closely mostly,
and in fact ARCH=ppc64 now uses the arch/powerpc/xmon version.
The main difference for ppc64 is that the 'p' command to call
show_state (which was always pretty dodgy) has been replaced by
the ppc32 'p' command, which calls a given procedure (so in fact
the old 'p' command behaviour can be achieved with 'p $show_state').

Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/xmon/nonstdio.h

@@ -0,0 +1,22 @@
+typedef int	FILE;
+extern FILE *xmon_stdin, *xmon_stdout;
+#define EOF	(-1)
+#define stdin	xmon_stdin
+#define stdout	xmon_stdout
+#define printf	xmon_printf
+#define fprintf	xmon_fprintf
+#define fputs	xmon_fputs
+#define fgets	xmon_fgets
+#define putchar	xmon_putchar
+#define getchar	xmon_getchar
+#define putc	xmon_putc
+#define getc	xmon_getc
+#define fopen(n, m)	NULL
+#define fflush(f)	do {} while (0)
+#define fclose(f)	do {} while (0)
+extern char *fgets(char *, int, void *);
+extern void xmon_printf(const char *, ...);
+extern void xmon_fprintf(void *, const char *, ...);
+extern void xmon_sprintf(char *, const char *, ...);
+
+#define perror(s)	printf("%s: no files!\n", (s))