[ARM] Orion: activate workaround for 88f6183 SPI clock erratum

Commit 2ede90ca78500ca0ffeee19d7812d345f8ad152d adds 6183 support,
but the SPI support in there doesn't work since it depends on a
6183 SPI unit erratum fix that only just went upstream, via commit
2bec19feabd53cba75e9dab0e79afbe868a37113.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
index a2f917e..437065c 100644
--- a/arch/arm/mach-orion5x/common.c
+++ b/arch/arm/mach-orion5x/common.c
@@ -310,7 +310,8 @@
  * SPI
  ****************************************************************************/
 static struct orion_spi_info orion5x_spi_plat_data = {
-	.tclk		= 0,
+	.tclk			= 0,
+	.enable_clock_fix	= 1,
 };
 
 static struct resource orion5x_spi_resources[] = {