ti-cgt-pru: use HOST_TI_CGT_PRU_DL_DIR instead of TI_CGT_PRU_DL_DIR

The infrastructure only provides HOST_TI_CGT_PRU_DL_DIR, because this
package is host only. Ideally the infra should provide TI_CGT_PRU_DL_DIR,
but it doesn't currently, and that requires more significant changes.

Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/ti-cgt-pru/ti-cgt-pru.mk

@@ -13,8 +13,8 @@ TI_CGT_PRU_LICENSE_FILES = PRU_Code_Generation_Tools_2.2.x_manifest.html \
 	pru_rts_2_2_0_82167478-F8C9-49b2-82BD-12F8550770F9.spdx
 
 define HOST_TI_CGT_PRU_EXTRACT_CMDS
-	chmod +x $(TI_CGT_PRU_DL_DIR)/$(TI_CGT_PRU_SOURCE)
-	$(TI_CGT_PRU_DL_DIR)/$(TI_CGT_PRU_SOURCE) --prefix $(@D) --mode unattended
+	chmod +x $(HOST_TI_CGT_PRU_DL_DIR)/$(TI_CGT_PRU_SOURCE)
+	$(HOST_TI_CGT_PRU_DL_DIR)/$(TI_CGT_PRU_SOURCE) --prefix $(@D) --mode unattended
 	mv $(@D)/ti-cgt-pru_$(TI_CGT_PRU_VERSION)/* $(@D)
 	rmdir $(@D)/ti-cgt-pru_$(TI_CGT_PRU_VERSION)/
 endef