ppc: Move reset_status to arch_global_data

Move this field into arch_global_data and tidy up.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/powerpc/cpu/mpc8260/cpu_init.c b/arch/powerpc/cpu/mpc8260/cpu_init.c
index acd48a9..3964e60 100644
--- a/arch/powerpc/cpu/mpc8260/cpu_init.c
+++ b/arch/powerpc/cpu/mpc8260/cpu_init.c
@@ -120,7 +120,7 @@
 	memset ((void *) gd, 0, sizeof (gd_t));
 
 	/* RSR - Reset Status Register - clear all status (5-4) */
-	gd->reset_status = immr->im_clkrst.car_rsr;
+	gd->arch.reset_status = immr->im_clkrst.car_rsr;
 	immr->im_clkrst.car_rsr = RSR_ALLBITS;
 
 	/* RMR - Reset Mode Register - contains checkstop reset enable (5-5) */
@@ -274,7 +274,7 @@
 		RSR_EHRS, "External Hard"}
 	};
 	static int n = sizeof bits / sizeof bits[0];
-	ulong rsr = gd->reset_status;
+	ulong rsr = gd->arch.reset_status;
 	int i;
 	char *sep;