powerpc/xmon: Enable breakpoints on 8xx

Since commit 4ad8622 ("powerpc/8xx: Implement hw_breakpoint"),
8xx has breakpoints so there is no reason to opt breakpoint logic
out of xmon for the 8xx.

Fixes: 4ad8622 ("powerpc/8xx: Implement hw_breakpoint")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/b0607f1113d1558e73476bb06db0ee16d31a6e5b.1608716197.git.christophe.leroy@csgroup.eu

arch/powerpc/xmon/xmon.c

@@ -1383,7 +1383,6 @@ static long check_bp_loc(unsigned long addr)
 	return 1;
 }
 
-#ifndef CONFIG_PPC_8xx
 static int find_free_data_bpt(void)
 {
 	int i;
@@ -1395,7 +1394,6 @@ static int find_free_data_bpt(void)
 	printf("Couldn't find free breakpoint register\n");
 	return -1;
 }
-#endif
 
 static void print_data_bpts(void)
 {
@@ -1435,7 +1433,6 @@ bpt_cmds(void)
 	cmd = inchar();
 
 	switch (cmd) {
-#ifndef CONFIG_PPC_8xx
 	static const char badaddr[] = "Only kernel addresses are permitted for breakpoints\n";
 	int mode;
 	case 'd':	/* bd - hardware data breakpoint */
@@ -1497,7 +1494,6 @@ bpt_cmds(void)
 			force_enable_xmon();
 		}
 		break;
-#endif
 
 	case 'c':
 		if (!scanhex(&a)) {