armv8/ls2085a: Enable DSPI get input clk form 'mxc_get_clock'

Signed-off-by: NHaikun Wang <haikun.wang@freescale.com>
Reviewed-by: NYork Sun <yorksun@freescale.com>

arch/arm/cpu/armv8/fsl-lsch3/speed.c

@@ -180,6 +180,8 @@ unsigned int mxc_get_clock(enum mxc_clock clk)
 	switch (clk) {
 	case MXC_I2C_CLK:
 		return get_bus_freq(0) / 2;
+	case MXC_DSPI_CLK:
+		return get_bus_freq(0) / 2;
 	default:
 		printf("Unsupported clock\n");
 	}

arch/arm/include/asm/arch-fsl-lsch3/clock.h

@@ -16,6 +16,7 @@ enum mxc_clock {
 	MXC_UART_CLK,
 	MXC_ESDHC_CLK,
 	MXC_I2C_CLK,
+	MXC_DSPI_CLK,
 };
 
 unsigned int mxc_get_clock(enum mxc_clock clk);