jetway/nf81-t56n-lf: Use std memset/memcpy func over AGESA

Replace usage of AGESA poor reinvention of memset/memcpy functions with
the usual standard ones.

Change-Id: Ibfe9ee253d57140b06a4fca6b47b2051308ad012
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/5484
Tested-by: build bot (Jenkins)
jetway/nf81-t56n-lf: Replace AGESA types with stdint types

Try to use void and uint*_t type specifiers in place of VOID and UINT*
respectively. Use const in place of CONST type modifier. Remove some
useless type casts.
A few unneeded comments containing the AGESA redefenied types are also
removed.

Change-Id: I4bff96a222507fc35333488331c3f35ef1158132
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/5486
Tested-by: build bot (Jenkins)