net/rds: Fix minor linker warnings

net/rds: Fix minor linker warnings

Fixes: fcdaab66 {IB/{core,ipoib},net/{mlx4,rds}}: Mark unload_allowed
as __initdata variable

Seeing this warning while building the kernel. Fix it.
MODPOST 1555 modules
WARNING: net/rds/rds_rdma.o(.text+0x1d8): Section mismatch in
reference from the function rds_rdma_init() to the variable
.init.data:unload_allowed
The function rds_rdma_init() references
the variable __initdata unload_allowed.
This is often because rds_rdma_init lacks a __initdata
annotation or the annotation of unload_allowed is wrong.

Orabug: 25393132

Signed-off-by: Babu Moger <babu.moger@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Allen Pais <allen.pais@oracle.com>