dw_dmac: Remove compilation dependency from AVR32 and put on HAVE_CLK

This driver will now be used in atleast two platforms AVR32 & ARM. And there is
no actual hardware dependency of this driver over AVR32 or ARM. So this
dependency can be removed altogether.

Also dw_dmac driver uses clk framework and must have compilation dependency on
HAVE_CLK
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/Kconfig

@@ -82,7 +82,7 @@ config INTEL_IOP_ADMA
 
 config DW_DMAC
 	tristate "Synopsys DesignWare AHB DMA support"
-	depends on AVR32
+	depends on HAVE_CLK
 	select DMA_ENGINE
 	default y if CPU_AT32AP7000
 	help