msm: pil-q6v5: Correct instance of read-modify-write (no functional impact)

Correct a typo in the Q6 shutdown path where an "=" was mistakenly
used in place of an "|=". This change has no functional affect
because the same value (0x6) happens to be written to the register
either way.

Change-Id: I32779ebbcfbc58f66fe268bb233d9a353142c49b
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
diff --git a/arch/arm/mach-msm/pil-q6v5.c b/arch/arm/mach-msm/pil-q6v5.c
index 7f8d3b9..0263faf 100644
--- a/arch/arm/mach-msm/pil-q6v5.c
+++ b/arch/arm/mach-msm/pil-q6v5.c
@@ -167,7 +167,7 @@
 
 	/* Assert Q6 resets */
 	val = readl_relaxed(drv->reg_base + QDSP6SS_RESET);
-	val = (Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENA);
+	val |= (Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENA);
 	writel_relaxed(val, drv->reg_base + QDSP6SS_RESET);
 
 	/* Kill power at block headswitch */