spi: orion: fix comment to mention MVEBU

MVEBU chips (Armada XP, Armada 370 and others) are supported by this
driver. Mention this in the help text to make more obvious what is
already specified in the dependencies of this symbol.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index b799547..2b01191 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -451,7 +451,8 @@
 	tristate "Orion SPI master"
 	depends on PLAT_ORION || ARCH_MVEBU || COMPILE_TEST
 	help
-	  This enables using the SPI master controller on the Orion chips.
+	  This enables using the SPI master controller on the Orion
+	  and MVEBU chips.
 
 config SPI_PIC32
 	tristate "Microchip PIC32 series SPI"