spi: ich: Change PCHV_ to ICHV_

The ICH SPI controller supports two variants, one of which is ICH7
compatible and the other is ICH9 compatible. Change 'pch_version'
to 'ich_version' to better match its original name.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jteki@openedev.com>
Tested-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/spi/ich.h b/drivers/spi/ich.h
index 6344e80..bd0a820 100644
--- a/drivers/spi/ich.h
+++ b/drivers/spi/ich.h
@@ -127,8 +127,13 @@
 #define SPI_OPCODE_WREN		0x06
 #define SPI_OPCODE_FAST_READ	0x0b
 
+enum ich_version {
+	ICHV_7,
+	ICHV_9,
+};
+
 struct ich_spi_platdata {
-	enum pch_version ich_version;	/* Controller version, 7 or 9 */
+	enum ich_version ich_version;	/* Controller version, 7 or 9 */
 };
 
 struct ich_spi_priv {