drivers: qpnp-bms: Use disable_irq_nosync() in IRQ context

Do not use disable_irq() as it waits for the irq handler
to complete causing a deadlock.

CRs-Fixed: 591227
Change-Id: I0a1d29845b3bced2fda6080765c20dff678050d4
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>