x86-64: Add RDI clobber to tls_global_dynamic_64 patterns

x86-64: Add RDI clobber to tls_global_dynamic_64 patterns

*tls_global_dynamic_64_<mode> uses RDI as the __tls_get_addr argument.
Add RDI clobber to tls_global_dynamic_64 patterns to show it.

	PR target/120908
	* config/i386/i386.cc (legitimize_tls_address): Pass RDI to
	gen_tls_global_dynamic_64.
	* config/i386/i386.md (*tls_global_dynamic_64_<mode>): Add RDI
	clobber and use it to generate LEA.
	(@tls_global_dynamic_64_<mode>): Add a clobber.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
(cherry picked from commit 7710d513a552f1fa1b7485ec6b318bafaa6d4cd7)