x86/paravirt: Remove GPL from pv_ops export

x86/paravirt: Remove GPL from pv_ops export

Commit e671554c3fb12f ("x86/paravirt: Use a single ops structure")
introduced a regression for out-of-tree modules using spinlocks, as
pv_lock_ops was exported via EXPORT_SYMBOL(), while the new pv_ops
structure now containing the pv lock operations is exported via
EXPORT_SYMBOL_GPL().

Change that by using EXPORT_SYMBOL(pv_ops).

Fixes: e671554c3fb12f ("x86/paravirt: Use a single ops structure")
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: xen-devel@lists.xenproject.org
Cc: virtualization@lists.linux-foundation.org
Cc: akataria@vmware.com
Cc: rusty@rustcorp.com.au
Cc: boris.ostrovsky@oracle.com
Cc: hpa@zytor.com
Link: https://lkml.kernel.org/r/20181029150116.25372-1-jgross@suse.com