ramips: disable the WP pin on the SDK mmc driver

Signed-off-by: John Crispin <john@phrozen.org>

target/linux/ramips/patches-4.4/0085-sdhci-no-wp.patch

@@ -0,0 +1,21 @@
+--- a/drivers/mmc/host/mtk-mmc/sd.c
++++ b/drivers/mmc/host/mtk-mmc/sd.c
+@@ -195,7 +195,7 @@
+ 	.dat_drv        = 4,
+ 	.data_pins      = 4,
+ 	.data_offset    = 0,
+-	.flags          = MSDC_SYS_SUSPEND | MSDC_WP_PIN_EN | MSDC_CD_PIN_EN | MSDC_REMOVABLE | MSDC_HIGHSPEED,
++	.flags          = MSDC_SYS_SUSPEND | MSDC_CD_PIN_EN | MSDC_REMOVABLE | MSDC_HIGHSPEED,
+ //	.flags          = MSDC_SYS_SUSPEND | MSDC_WP_PIN_EN | MSDC_CD_PIN_EN | MSDC_REMOVABLE,
+ };
+ 
+@@ -2746,6 +2746,9 @@
+     int ret, irq;
+  
+     pdev->dev.platform_data = &msdc0_hw;
++ 
++   if (of_property_read_bool(pdev->dev.of_node, "mtk,wp-en"))
++	msdc0_hw.flags |= MSDC_WP_PIN_EN;
+   
+     /* Allocate MMC host for this device */
+     mmc = mmc_alloc_host(sizeof(struct msdc_host), &pdev->dev);