net/cxgbe: fix other misc build issues for Windows

net/cxgbe: fix other misc build issues for Windows

Fix following build errors reported by Intel C++ compiler in Windows
build.

C:\> t4_hw.c(5105): warning #147: declaration is incompatible with
"int t4_bar2_sge_qregs(struct adapter *, unsigned int, unsigned int,
u64={uint64_t={unsigned __int64}} *, unsigned int *)"
(declared at line 524 of "..\..\..\..\drivers\net\cxgbe\base\common.h")
    int t4_bar2_sge_qregs(struct adapter *adapter, unsigned int qid,
        ^

C:\> cxgbe_filter.c(42): error : expected an expression
        n_user_filters = mult_frac(adap->tids.nftids,
                         ^

C:\> sge.c(400): error : expression must be a pointer to a complete
object type
                  (uint16_t)(RTE_PTR_ALIGN((char *)mbuf->buf_addr +
                             ^

Build Environment:
1. Target OS: Microsoft Windows Server 2016
2. Compiler: Intel C++ Compiler from Intel Parallel Studio XE 2019 [1]
3. Development Tools:
   3.1 Microsoft Visual Studio 2017 Professional
   3.2 Windows Software Development Kit (SDK) v10.0.17763
   3.3 Windows Driver Kit (WDK) v10.0.17763

[1] https://software.intel.com/en-us/parallel-studio-xe

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>