power: qpnp-smbcharger: Change CHG_LED default blink pattern

Two blinking patterns are supported in CHG_LED. Blinking pattern 1 is
150ms on and 750ms off,  blinking pattern 2 is 500ms on and 3000ms off.
Blinking pattern 2 has less duty on compared them with in a same period
which would have less power consumption as well. Choose blinking pattern
2 as the default blinking mode for less power consumption when it acting
as event notification.

CRs-Fixed: 1011525
Change-Id: I61badbd62d8fb98fcd5f1728b089afdb8efa3860
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>