ARM: at91/trivial: unify functions and machine names

Remove the string "(Device Tree)" after the machine name because all AT91
machines use the DT nowadays.
Also change some function names to unify following the convention:
- at91sam9xxx aren't named sam9, 9xxx but with the full name
- sama5 are the ones that don't have the at91 prefix anymore.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 25bb93d..af8d8af 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -319,7 +319,7 @@
 	suspend_set_ops(&at91_pm_ops);
 }
 
-void __init at91_rm9200_pm_init(void)
+void __init at91rm9200_pm_init(void)
 {
 	at91_dt_ramc();
 
@@ -334,7 +334,7 @@
 	at91_pm_init();
 }
 
-void __init at91_sam9260_pm_init(void)
+void __init at91sam9260_pm_init(void)
 {
 	at91_dt_ramc();
 	at91_pm_data.memctrl = AT91_MEMCTRL_SDRAMC;
@@ -342,7 +342,7 @@
 	return at91_pm_init();
 }
 
-void __init at91_sam9g45_pm_init(void)
+void __init at91sam9g45_pm_init(void)
 {
 	at91_dt_ramc();
 	at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP;
@@ -350,7 +350,7 @@
 	return at91_pm_init();
 }
 
-void __init at91_sam9x5_pm_init(void)
+void __init at91sam9x5_pm_init(void)
 {
 	at91_dt_ramc();
 	at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;