re PR target/54089 ([SH] Refactor shift patterns)

	PR target/54089
	* config/sh/predicates.md (arith_reg_or_t_reg_operand): New predicate.
	* config/sh/sh.md (*rotcr): Use arith_reg_or_t_reg_operand predicate.
	Handle the case where one of the operands is T_REG.
	Add new pattern to handle MSB extraction.

	PR target/54089
	* gcc.target/sh/pr54089-1.c (test_11, test_12, test_13, test_14): New
	functions.

From-SVN: r191490