vxge_os_dma_malloc() and vxge_os_dma_malloc_async() are both called from
callchains which use GFP_KERNEL allocations unconditionally or have other
requirements to be called from fully preemptible task context..

vxge_os_dma_malloc():
  1)  __vxge_hw_blockpool_create() <- GFP_KERNEL

  2)  __vxge_hw_mempool_grow() <- vzalloc()
        __vxge_hw_blockpool_malloc()

vxge_os_dma_malloc_async():
  1  __vxge_hw_mempool_grow() <- vzalloc()
      __vxge_hw_blockpool_malloc()
	__vxge_hw_blockpool_blocks_add()

  2)  vxge_hw_vpath_open()	<- vzalloc()
	__vxge_hw_blockpool_block_allocate()

That means neither of these functions needs a conditional allocation mode.

Remove the in_interrupt() conditional and use GFP_KERNEL.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>