spi: au1550: Fix bug in deallocation of memory

This patch fixes a bug on the deallocation of memory allocated using
request_mem_region, by using release_mem_region instead of
release_resource and kfree.

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/spi/spi-au1550.c

diff --git a/drivers/spi/spi-au1550.c b/drivers/spi/spi-au1550.c
index 67375a1..fb61464 100644
--- a/drivers/spi/spi-au1550.c
+++ b/drivers/spi/spi-au1550.c
@@ -925,8 +925,7 @@
 	iounmap((void __iomem *)hw->regs);
 
 err_ioremap:
-	release_resource(hw->ioarea);
-	kfree(hw->ioarea);
+	release_mem_region(r->start, sizeof(psc_spi_t));
 
 err_no_iores:
 err_no_pdata:
@@ -946,8 +945,7 @@
 	spi_bitbang_stop(&hw->bitbang);
 	free_irq(hw->irq, hw);
 	iounmap((void __iomem *)hw->regs);
-	release_resource(hw->ioarea);
-	kfree(hw->ioarea);
+	release_mem_region(r->start, sizeof(psc_spi_t));
 
 	if (hw->usedma) {
 		au1550_spi_dma_rxtmp_free(hw);