pmqos: Fix bug of 'support' property of pass-pmqos.conf

pmqos: Fix bug of 'support' property of pass-pmqos.conf

This patch fixes the bug related to 'support' property of pass-pmqos.conf.

PASS PMQoS has the pass-pmqos.conf which contains the supported scenario
name and the number of supported scenarios. Each scenario has the 'support'
property indicating whether scenario is supported or not on platform.

If the 'support' property value is changed from 'yes' to 'no',
PASS shows the following error log during the init step.
[error log]
 edbus-handler.c: register_method(713) > fail to add method (null)!
 edbus-handler.c: register_edbus_method(862) > fail to register /Org/Tizen/System/Pass/Pmqos method(-22)
 pmqos.c: pmqos_init_done(395) > fail to init edbus method from conf(-22)

Change-Id: Icbb0d29c941345f21c3bcc4ae513ff73095a3aff
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>