disk/part.c: Make features optional

If we don't want to build support for any partition types we can now
add #undef CONFIG_PARTITIONS in a board config file to keep this from
being compiled in. Otherwise boards assume this is compiled in by
default

Signed-off-by: Matthew McClintock <msm@freescale.com>

drivers/block/mg_disk.c

@@ -522,10 +522,12 @@ mg_write_exit:
 	return err;
 }
 
+#ifdef CONFIG_PARTITIONS
 block_dev_desc_t *mg_disk_get_dev(int dev)
 {
 	return ((block_dev_desc_t *) & mg_disk_dev);
 }
+#endif
 
 /* must override this function */
 struct mg_drv_data * __attribute__((weak)) mg_get_drv_data (void)

drivers/block/systemace.c

@@ -104,6 +104,7 @@ static void release_cf_lock(void)
 	ace_writew((val & 0xffff), 0x18);
 }
 
+#ifdef CONFIG_PARTITIONS
 block_dev_desc_t *systemace_get_dev(int dev)
 {
 	/* The first time through this, the systemace_dev object is
@@ -128,6 +129,7 @@ block_dev_desc_t *systemace_get_dev(int dev)
 
 	return &systemace_dev;
 }
+#endif
 
 /*
  * This function is called (by dereferencing the block_read pointer in

drivers/mmc/mmc.c

@@ -1167,12 +1167,14 @@ int mmc_register(struct mmc *mmc)
 	return 0;
 }
 
+#ifdef CONFIG_PARTITIONS
 block_dev_desc_t *mmc_get_dev(int dev)
 {
 	struct mmc *mmc = find_mmc_device(dev);
 
 	return mmc ? &mmc->block_dev : NULL;
 }
+#endif
 
 int mmc_init(struct mmc *mmc)
 {