packagegroup-security-tpm2: Depend on preferred provider for cryptsetup

Signed-off-by: Jeremy Puhlman <jpuhlman@mvista.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-tpm/recipes-core/packagegroup/packagegroup-security-tpm2.bb

@@ -7,6 +7,7 @@ inherit packagegroup
 
 PACKAGES = "${PN}"
 
+PREFERRED_PROVIDER_cryptsetup ?= "cryptsetup-tpm-incubator"
 SUMMARY_packagegroup-security-tpm2 = "Security TPM 2.0 support"
 RDEPENDS_packagegroup-security-tpm2 = " \
     tpm2-tools \
@@ -19,5 +20,5 @@ RDEPENDS_packagegroup-security-tpm2 = " \
     tpm2-abrmd \
     tpm2-pkcs11 \
     ibmswtpm2 \
-    cryptsetup-tpm-incubator \
+    ${PREFERRED_PROVIDER_cryptsetup} \
     "