tpm_crb: Drop le32_to_cpu(ioread32(..))

ioread32 and readl are defined to read from PCI style memory, ie little
endian and return the result in host order. On platforms where a
swap is required ioread32/readl do the swap internally (eg see ppc).

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Acked-by: Peter Huewe <peterhuewe@gmx.de>