phosphor-fan.inc: bump version

Change-Id: I99d62b1aeb581d86d4493fe5e246031b3639ab69
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/common/recipes-phosphor/fans/phosphor-fan.inc b/common/recipes-phosphor/fans/phosphor-fan.inc
index f2e6b59..7a583ab 100644
--- a/common/recipes-phosphor/fans/phosphor-fan.inc
+++ b/common/recipes-phosphor/fans/phosphor-fan.inc
@@ -2,4 +2,4 @@
 LICENSE = "Apache-2.0"
 LIC_FILES_CHKSUM = "file://${S}/LICENSE;md5=e3fc50a88d0a364313df4b21ef20c29e"
 SRC_URI += "git://github.com/openbmc/phosphor-fan-presence"
-SRCREV = "78498c941d3f0445e2c62894123e05df057258f7"
+SRCREV = "77d32d1b0b780b9ac773bc49a6c74c19508ff8e8"