ARM1136: add cache flush and invalidate operations

ARM1136: add cache flush and invalidate operations

Since commit 5c1ad3e6f8ae578bbe30e09652f1531e9bc22031
(net: fec_mxc: allow use with cache enabled) the FEC_MXC
driver uses flush_dcache_range() and invalidate_dcache_range()
functions. This driver is also configured for ARM1136 based
'flea3' and 'mx35pdk' boards which currently do not build
as there are no ARM1136 specific flush_dcache_range() and
invalidate_dcache_range() functions. Add various ARM1136
cache functions to fix building for 'flea3' and 'mx35pdk'.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
CC: Mike Frysinger <vapier@gentoo.org>
CC: Marek Vasut <marex@denx.de>
Acked-by: Marek Vasut <marex@denx.de>