rmnet_smux: Increase Rmnet device instance count
rmnet_smux: Increase Rmnet device instance count

Rmnet supports only one device instance.

Increase Rmnet device instance count to enable dual PDN support.

CRs-Fixed: 497343
Change-Id: I1b3eacec4404ac72a524380a1fff39e6b257ade8
Signed-off-by: Arun Kumar Neelakantam <e36519ed998e577ca4306dc3c35b89f0bef834f3@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas