package/ibm-sw-tpm2: add patch to fix build issues on several architectures

package/ibm-sw-tpm2: add patch to fix build issues on several architectures

src/LibSupport.h has some logic to find the wordsize of the current
architecture, using an explicit list of CPU architectures. This makes
the build fail on a number of CPU architectures that are not
explicitly handled.

Let's instead use the __WORDSIZE definition of the C library, which is
guaranteed to be available for all CPU architectures.

Fixes:

  http://autobuild.buildroot.net/results/a235345477ea2ec3b0dd4ffed4d7667d46caec48/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>