usb: gadget: Increase Tx/Rx buffers in serial driver
usb: gadget: Increase Tx/Rx buffers in serial driver

Increases Tx/Rx buffers to 8x4k inorder to pump more data
to userspace.

Change-Id: I8d7bf16ab7a0058f001b58b140afd33481bec618
Signed-off-by: Anji Jonnala <d32984257c2b1f19a52887b31db69164a662fd03@qualcomm.com>

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