vxge: Fix a possible memory leak in vxge_hw_device_initialize().

- Fix a possible memory leak in vxge_hw_device_initialize(). Free hldev if
vxge_hw_device_reg_addr_get() fails.

Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@exar.com>
Signed-off-by: Ramkrishna Vepa <ram.vepa@exar.com>
Signed-off-by: David S. Miller <davem@davemloft.net>