Revert "xhci: Fix memory leak when caching protocol extended capability PSI tables"

This reverts commit fc57313d.

Marek reports that it breaks things:
	This patch landed in today's linux-next (20200211) and causes
	NULL pointer dereference during second suspend/resume cycle on
	Samsung Exynos5422-based (arm 32bit) Odroid XU3lite board:

A more complete fix will be added soon.

Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Fixes: fc57313d ("xhci: Fix memory leak when caching protocol extended capability PSI tables")
Cc: Paul Menzel <pmenzel@molgen.mpg.de>
Cc: Sajja Venkateswara Rao <VenkateswaraRao.Sajja@amd.com>
Cc: stable <stable@vger.kernel.org> # v4.4+
Cc: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>