mpc83xx: cleanup System Part and Revision ID Register (SPRIDR) code
in the spirit of commit 1ced1216, 85xx's "Update SVR numbers to expand support", simplify SPRIDR processing and processor ID display. Add REVID_{MAJ,MIN}OR macros to make REVID dependent code simpler. Also added PARTID_NO_E and IS_E_PROCESSOR convenience macros. Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
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