mmc: omap_hsmmc: use the generic config for omap2plus devices

OMAP's hs_mmc driver is used for MMC controller operation on many
omap2plus SoCs (OMAP2430, OMAP3, 4, 5 and AM335x).

Considering that the device tree entries are already present for these,
allow the driver to be built using the config ARCH_OMAP2PLUS rather
than individually adding a config for each SoC to enable the
support.

Use COMPILE_TEST to enable the build for other platforms.
Signed-off-by: Amarinder Bindra <a-bindra@ti.com>
Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Cc: Nishanth Menon <nm@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/Kconfig

@@ -284,11 +284,11 @@ config MMC_OMAP
 
 config MMC_OMAP_HS
 	tristate "TI OMAP High Speed Multimedia Card Interface support"
-	depends on SOC_OMAP2430 || ARCH_OMAP3 || ARCH_OMAP4
+	depends on ARCH_OMAP2PLUS || COMPILE_TEST
 	help
 	  This selects the TI OMAP High Speed Multimedia card Interface.
-	  If you have an OMAP2430 or OMAP3 board or OMAP4 board with a
-	  Multimedia Card slot, say Y or M here.
+	  If you have an omap2plus board with a Multimedia Card slot,
+	  say Y or M here.
 
 	  If unsure, say N.