cxgb4: Fix build warnings introduced after T4 configuration file support

cxgb4: Fix build warnings introduced after T4 configuration file support

This patch adds patch series from linux-next tree to fix build warnings
introduced after T4 configuration file support addition.

Dynamically allocate memory in t4_memory_rw() and get_vpd_params() to reduce
stack foot prints.

Fixes build failure due to missing linux/vmalloc.h include.

Addresses various sparse warnings related to type assignment issues, function
definition and symbol shadowing.

Signed-off-by: Vipul Pandya <vipul@chelsio.com>