ARM: dts: qcom: msm8974-sony-xperia-rhine: Add alias for mmc0 & mmc1

Add an alias for the internal storage so it always becomes mmcblk0 and
SD card becomes mmcblk1.

This avoids issues with internal storage becoming mmcblk1 unexpectedly
and aligns this board with other boards that use MMC storage.

Signed-off-by: Luca Weiss <luca@lucaweiss.eu>
Link: https://lore.kernel.org/r/20250610-msm8974-mmc-alias-v2-3-1d8808478fba@lucaweiss.eu
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Author: z3ntu

arch/arm/boot/dts/qcom/qcom-msm8974-sony-xperia-rhine.dtsi

@@ -8,6 +8,8 @@
 
 / {
 	aliases {
+		mmc0 = &sdhc_1;
+		mmc1 = &sdhc_2;
 		serial0 = &blsp1_uart2;
 	};