6494306 need single source for bignum code

--HG--
rename : usr/src/uts/sun4u/rsa/Makefile => deleted_files/usr/src/uts/sun4u/rsa/Makefile
rename : usr/src/uts/sun4u/rsa/mont_mulf.s => usr/src/common

6494306 need single source for bignum code

--HG--
rename : usr/src/uts/sun4u/rsa/Makefile => deleted_files/usr/src/uts/sun4u/rsa/Makefile
rename : usr/src/uts/sun4u/rsa/mont_mulf.s => usr/src/common/bignum/sun4u/mont_mulf_kernel_v9.s
rename : usr/src/uts/intel/rsa/Makefile.32 => usr/src/uts/intel/bignum/Makefile.32
rename : usr/src/uts/intel/rsa/Makefile.64 => usr/src/uts/intel/bignum/Makefile.64

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