sparc: Minor tweaks to Niagara page copy/clear.

[ Upstream commit e95ade083939dcb4b0c51c1a2c8504ea9ef3d6ef ]

Don't use floating point on Niagara2, use the traditional
plain Niagara code instead.

Unroll Niagara loops to 128 bytes for copy, and 256 bytes
for clear.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
4 files changed