package/tpm2-tools: license is 3c BSD, not 2c

The license contains the "no endorsement" clause, so it should be listed as
BSD-3-Clause:

  * Neither the name of Intel Corporation nor the names of its contributors
    may be used to endorse or promote products derived from this software
    without specific prior written permission.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/tpm2-tools/tpm2-tools.mk

@@ -6,7 +6,7 @@
 
 TPM2_TOOLS_VERSION = 3.1.4
 TPM2_TOOLS_SITE = https://github.com/tpm2-software/tpm2-tools/releases/download/$(TPM2_TOOLS_VERSION)
-TPM2_TOOLS_LICENSE = BSD-2-Clause
+TPM2_TOOLS_LICENSE = BSD-3-Clause
 TPM2_TOOLS_LICENSE_FILES = LICENSE
 TPM2_TOOLS_DEPENDENCIES = libcurl openssl tpm2-tss host-pkgconf