spi-topcliff-pch: fix -Wuninitialized warning

Fix for:
drivers/spi/spi-topcliff-pch.c: In function ‘pch_spi_handler_sub’:
drivers/spi/spi-topcliff-pch.c:325:17: warning: ‘bpw_len’ may be
  used uninitialized in this function [-Wuninitialized]
drivers/spi/spi-topcliff-pch.c:325:42: warning: ‘rx_index’ may be
  used uninitialized in this function [-Wuninitialized]
drivers/spi/spi-topcliff-pch.c:325:42: warning: ‘tx_index’ may be
  used uninitialized in this function [-Wuninitialized]

Move usage of tx_index, rx_index and bpw_len into the same
block as where they are set to prevent uninitialized usage.

v2: instead of init variables with 0 move the whole block
Signed-off-by: Danny Kukawka <danny.kukawka@bisect.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

drivers/spi/spi-topcliff-pch.c

@@ -318,13 +318,12 @@ static void pch_spi_handler_sub(struct pch_spi_data *data, u32 reg_spsr_val,
 		data->tx_index = tx_index;
 		data->rx_index = rx_index;
 
-	}
-
 		/* if transfer complete interrupt */
 		if (reg_spsr_val & SPSR_FI_BIT) {
 			if ((tx_index == bpw_len) && (rx_index == tx_index)) {
 				/* disable interrupts */
-			pch_spi_setclr_reg(data->master, PCH_SPCR, 0, PCH_ALL);
+				pch_spi_setclr_reg(data->master, PCH_SPCR, 0,
+						   PCH_ALL);
 
 				/* transfer is completed;
 				   inform pch_spi_process_messages */
@@ -333,7 +332,9 @@ static void pch_spi_handler_sub(struct pch_spi_data *data, u32 reg_spsr_val,
 				wake_up(&data->wait);
 			} else {
 				dev_err(&data->master->dev,
-				"%s : Transfer is not completed", __func__);
+					"%s : Transfer is not completed",
+					__func__);
+			}
 		}
 	}
 }