mmc: atmel: rename CONFIG_ATMEL_SDHCI to CONFIG_MMC_SDHCI_ATMEL

Make the naming scheme consistent; all SDHCI-base drivers prefixed
with CONFIG_MMC_SDHCI_.

While we are here, add "depends on ARCH_AT91".

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 520e7ea..0c07781 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -51,17 +51,6 @@
 	  operations too, which can remove the need for malloc support in SPL
 	  and thus further reduce footprint.
 
-config ATMEL_SDHCI
-	bool "Atmel SDHCI controller support"
-	depends on DM_MMC && BLK && DM_MMC_OPS && ARCH_AT91
-	depends on MMC_SDHCI
-	help
-	  This enables support for the Atmel SDHCI controller, which supports
-	  the embedded MultiMedia Card (e.MMC) Specification V4.51, the SD
-	  Memory Card Specification V3.0, and the SDIO V3.0 specification.
-	  It is compliant with the SD Host Controller Standard V3.0
-	  specification.
-
 config MMC_DAVINCI
 	bool "TI DAVINCI Multimedia Card Interface support"
 	depends on ARCH_DAVINCI
@@ -191,6 +180,18 @@
 	  This enables support for the SDMA (Single Operation DMA) defined
 	  in the SD Host Controller Standard Specification Version 1.00 .
 
+config MMC_SDHCI_ATMEL
+	bool "Atmel SDHCI controller support"
+	depends on ARCH_AT91
+	depends on DM_MMC && BLK && DM_MMC_OPS && ARCH_AT91
+	depends on MMC_SDHCI
+	help
+	  This enables support for the Atmel SDHCI controller, which supports
+	  the embedded MultiMedia Card (e.MMC) Specification V4.51, the SD
+	  Memory Card Specification V3.0, and the SDIO V3.0 specification.
+	  It is compliant with the SD Host Controller Standard V3.0
+	  specification.
+
 config MMC_SDHCI_BCM2835
 	tristate "SDHCI support for the BCM2835 SD/MMC Controller"
 	depends on ARCH_BCM283X