rockchip: rk3568: Fix boot device detection

The boot source node path for emmc is using the old sdhci name.
Replace with correct mmc name and also add same-as-spl to boot order.

Fixes: 0d61f8e5f1c0 ("rockchip: rk3568: add boot device detection")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/mach-rockchip/rk3568/rk3568.c b/arch/arm/mach-rockchip/rk3568/rk3568.c
index 4a08820a..69ef19c 100644
--- a/arch/arm/mach-rockchip/rk3568/rk3568.c
+++ b/arch/arm/mach-rockchip/rk3568/rk3568.c
@@ -82,7 +82,7 @@
 };
 
 const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1] = {
-	[BROM_BOOTSOURCE_EMMC] = "/sdhci@fe310000",
+	[BROM_BOOTSOURCE_EMMC] = "/mmc@fe310000",
 	[BROM_BOOTSOURCE_SPINOR] = "/spi@fe300000/flash@0",
 	[BROM_BOOTSOURCE_SD] = "/mmc@fe2b0000",
 };