ARM: shmobile: r8a7791 is now called "R-Car M2-W"

As per recent revisions of the datasheet.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/Kconfig

@@ -59,7 +59,7 @@ config ARCH_R8A7790
 	select ARCH_RCAR_GEN2
 
 config ARCH_R8A7791
-	bool "R-Car M2 (R8A77910)"
+	bool "R-Car M2-W (R8A77910)"
 	select ARCH_RCAR_GEN2
 
 comment "Renesas ARM SoCs Board Type"
@@ -141,7 +141,7 @@ config ARCH_R8A7790
 	select ARCH_DMA_ADDR_T_64BIT if ARM_LPAE
 
 config ARCH_R8A7791
-	bool "R-Car M2 (R8A77910)"
+	bool "R-Car M2-W (R8A77910)"
 	select ARCH_RCAR_GEN2
 	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select ARM_GIC