sh: Add support for SH7721 CPU subtype.

Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/drivers/dma/Kconfig b/arch/sh/drivers/dma/Kconfig
index 4e711a0..0193636 100644
--- a/arch/sh/drivers/dma/Kconfig
+++ b/arch/sh/drivers/dma/Kconfig
@@ -12,7 +12,7 @@
 config NR_ONCHIP_DMA_CHANNELS
 	int
 	depends on SH_DMA
-	default "6" if CPU_SUBTYPE_SH7720
+	default "6" if CPU_SUBTYPE_SH7720 || CPU_SUBTYPE_SH7721
 	default "8" if CPU_SUBTYPE_SH7750R || CPU_SUBTYPE_SH7751R
 	default "12" if CPU_SUBTYPE_SH7780
 	default "4"