gallium: Add PIPE_CAP_ENDIANNESS

Cc: mesa-stable@lists.freedesktop.org
[ Francisco Jerez: Fix "PIPE_ENDIAN_SMALL" in the documentation,
  define PIPE_ENDIAN_NATIVE. ]
clover: Return correct value for CL_DEVICE_ENDIAN_LITTLE

Query the driver using PIPE_CAP_ENDIANNESS rather than always returning
true.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
clover: Pass corresponding module::argument to kernel::argument::bind().

And remove size information from most kernel::argument derived
classes, it's no longer going to be necessary.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
clover: Add kernel argument fields to allow differing host/target data types.

Loosely based on a similar patch by Tom Stellard.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
clover: Byte-swap kernel arguments when host and device endianness differ.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
clover: Extend kernel arguments for differing host and device data types.

Loosely based on a similar patch by Tom Stellard.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
clover: Respect kernel argument alignment restrictions.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
docs: Add items for GL4.4

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
gallium/util: Fix detection of AVX cpu caps

For AVX it's not sufficient to only rely on the cpuid flags. If the CPU
supports these extensions, but the OS doesn't, issuing these insns will
trigger an undefined opcode exception.

In addition to the AVX cpuid bit we also need to:
* test cpuid for OSXSAVE support
* XGETBV to check if the OS saves/restores AVX regs on context switches

See "Detecting Availability and Support" at
http://software.intel.com/en-us/articles/introduction-to-intel-advanced-vector-extensions

Signed-off-by: Andre Heider <a.heider@gmail.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: José Fonseca <jfonseca@vmware.com>