mx6: clock: Only show CSPI clock if CSPI is enabled

If a board does not enable CSPI, there is no need to show the CSPI clock
frequency as part of the 'clock' command.

Reported-by: Dirk Behme <dirk.behme@gmail.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Dirk Behme <dirk.behme@gmail.com>
diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index a01d96f..a50db70 100644
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -404,7 +404,9 @@
 	printf("\n");
 	printf("IPG        %8d kHz\n", mxc_get_clock(MXC_IPG_CLK) / 1000);
 	printf("UART       %8d kHz\n", mxc_get_clock(MXC_UART_CLK) / 1000);
+#ifdef CONFIG_MXC_SPI
 	printf("CSPI       %8d kHz\n", mxc_get_clock(MXC_CSPI_CLK) / 1000);
+#endif
 	printf("AHB        %8d kHz\n", mxc_get_clock(MXC_AHB_CLK) / 1000);
 	printf("AXI        %8d kHz\n", mxc_get_clock(MXC_AXI_CLK) / 1000);
 	printf("DDR        %8d kHz\n", mxc_get_clock(MXC_DDR_CLK) / 1000);