platform: msm: Remove warning messages from QPNP-PWM driver

The updated ARM GCC compiler warns about the usage of
a variable that might have been uninitialized. Comply
to the warnings.

Change-Id: Ia400ba4b895f91e828a9e485be0f1fe5c12bcd64
Signed-off-by: Jay Chokshi <jchokshi@codeaurora.org>
diff --git a/drivers/platform/msm/qpnp-pwm.c b/drivers/platform/msm/qpnp-pwm.c
index c9cd0e0..708d658 100644
--- a/drivers/platform/msm/qpnp-pwm.c
+++ b/drivers/platform/msm/qpnp-pwm.c
@@ -440,7 +440,7 @@
 	unsigned int		pwm_value, max_pwm_value;
 	struct qpnp_lpg_chip	*chip = pwm->chip;
 	struct qpnp_lut_config	*lut = &chip->lpg_config.lut_config;
-	int			i, pwm_size, rc;
+	int			i, pwm_size, rc = 0;
 	int			burst_size = SPMI_MAX_BUF_LEN;
 	int			list_len = lut->list_size << 1;
 	int			offset = lut->lo_index << 2;