meta-quanta: gbs: phosphor-hwmon: Fix missing boost dependency

The patch added an implicit boost dependency

Change-Id: Ic990f59d46101684d4576bfbba89ea0f4c9015e1
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-quanta/meta-gbs/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend b/meta-quanta/meta-gbs/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend
index 22b31cf..8f3f07f 100644
--- a/meta-quanta/meta-gbs/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend
+++ b/meta-quanta/meta-gbs/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend
@@ -3,6 +3,8 @@
 SRC_URI_append_gbs = " file://0002-Add-power-on-monitor-mechanism.patch \
                      "
 
+DEPENDS += "boost"
+
 GBS_NAMES = " \
         i2c@82000/sbtsi@4c \
         i2c@85000/i2c-switch@71/i2c@0/max31725@54 \