spi: spi-meson-spicc: Remove set but never used variable 'data' from meson_spicc_reset_fifo()

Looks like it hasn't ever been checked.

Fixes the following W=1 kernel build warning(s):

 drivers/spi/spi-meson-spicc.c: In function ‘meson_spicc_reset_fifo’:
 drivers/spi/spi-meson-spicc.c:365:6: warning: variable ‘data’ set but not used [-Wunused-but-set-variable]
 365 | u32 data;
 | ^~~~

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: linux-amlogic@lists.infradead.org
Link: https://lore.kernel.org/r/20200717135424.2442271-7-lee.jones@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-meson-spicc.c

@@ -362,8 +362,6 @@ static void meson_spicc_setup_xfer(struct meson_spicc_device *spicc,
 
 static void meson_spicc_reset_fifo(struct meson_spicc_device *spicc)
 {
-	u32 data;
-
 	if (spicc->data->has_oen)
 		writel_bits_relaxed(SPICC_ENH_MAIN_CLK_AO,
 				    SPICC_ENH_MAIN_CLK_AO,
@@ -373,7 +371,7 @@ static void meson_spicc_reset_fifo(struct meson_spicc_device *spicc)
 			    spicc->base + SPICC_TESTREG);
 
 	while (meson_spicc_rxready(spicc))
-		data = readl_relaxed(spicc->base + SPICC_RXDATA);
+		readl_relaxed(spicc->base + SPICC_RXDATA);
 
 	if (spicc->data->has_oen)
 		writel_bits_relaxed(SPICC_ENH_MAIN_CLK_AO, 0,