irqchip: mpm: Add mpm mapping for Blair

Currently both Blair and Holi use the same MPM pins mapping
configuration as they use the same compatible string. USB PHY
has a different GIC IRQ on Blair, so different MPM configuration
is required.

Change-Id: I1d72a70c0139abeac2d2ee32d103b7119a192ec9
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>