ARM: renesas: Rename ARCH_RMOBILE to ARCH_RENESAS

Rename ARCH_RMOBILE to ARCH_RENESAS because all the chips are made
by Renesas, while only a subset of them is from the R-Mobile
line.

Use the following command to perform the rename:

"
$ git grep -l 'ARCH_RMOBILE' | xargs -I {} sed -i 's@ARCH_RMOBILE@ARCH_RENESAS@g' {}
"

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
diff --git a/configs/rzn1_snarc_defconfig b/configs/rzn1_snarc_defconfig
index 5c65727..29a96d1 100644
--- a/configs/rzn1_snarc_defconfig
+++ b/configs/rzn1_snarc_defconfig
@@ -1,6 +1,6 @@
 CONFIG_ARM=y
 CONFIG_SYS_ARCH_TIMER=y
-CONFIG_ARCH_RMOBILE=y
+CONFIG_ARCH_RENESAS=y
 CONFIG_SYS_MALLOC_LEN=0xb0000
 CONFIG_SYS_MALLOC_F_LEN=0x800
 CONFIG_NR_DRAM_BANKS=1