powerpc: fix memory leaks in QE library

Fix two memory leaks in the Freescale QE library: add a missing kfree() in
ucc_fast_init() and ucc_slow_init() if the ioremap() fails, and update
ucc_fast_free() and ucc_slow_free() to call iounmap() if necessary.

Based on a patch from Tony Breeds <[e-mail]>.

Signed-off-by: Timur Tabi <[e-mail]>
Signed-off-by: Kumar Gala <[e-mail]>

arch/powerpc/sysdev/qe_lib/ucc_fast.c

···
 	uccf->uf_regs = ioremap(uf_info->regs, sizeof(struct ucc_fast));
 	if (uccf->uf_regs == NULL) {
 		printk(KERN_ERR "%s: Cannot map UCC registers\n", __func__);
+		kfree(uccf);
 		return -ENOMEM;
 	}
 
···
 
 	if (uccf->ucc_fast_rx_virtual_fifo_base_offset)
 		qe_muram_free(uccf->ucc_fast_rx_virtual_fifo_base_offset);
+
+	if (uccf->uf_regs)
+		iounmap(uccf->uf_regs);
 
 	kfree(uccf);
 }

arch/powerpc/sysdev/qe_lib/ucc_slow.c

···
 	uccs->us_regs = ioremap(us_info->regs, sizeof(struct ucc_slow));
 	if (uccs->us_regs == NULL) {
 		printk(KERN_ERR "%s: Cannot map UCC registers\n", __func__);
+		kfree(uccs);
 		return -ENOMEM;
 	}
 
···
 	if (uccs->tx_base_offset)
 		qe_muram_free(uccs->tx_base_offset);
 
-	if (uccs->us_pram) {
+	if (uccs->us_pram)
 		qe_muram_free(uccs->us_pram_offset);
-		uccs->us_pram = NULL;
-	}
+
+	if (uccs->us_regs)
+		iounmap(uccs->us_regs);
 
 	kfree(uccs);
 }