board: ti: README: Update OP-TEE binary name

The OP-TEE binary to use is renamed to v2 as the v1 binary has been
deprecated and is no longer built by default.

Reported-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>
diff --git a/board/ti/am65x/README b/board/ti/am65x/README
index 903763a..00be1ff 100644
--- a/board/ti/am65x/README
+++ b/board/ti/am65x/README
@@ -138,7 +138,7 @@
 
 4.2. A53:
 $ make ARCH=arm CROSS_COMPILE=aarch64-linux-gnu- am65x_evm_a53_defconfig O=/tmp/a53
-$ make ARCH=arm CROSS_COMPILE=aarch64-linux-gnu- ATF=<path to ATF dir>/build/k3/generic/release/bl31.bin TEE=<path to OPTEE OS dir>/out/arm-plat-k3/core/tee-pager.bin O=/tmp/a53
+$ make ARCH=arm CROSS_COMPILE=aarch64-linux-gnu- ATF=<path to ATF dir>/build/k3/generic/release/bl31.bin TEE=<path to OPTEE OS dir>/out/arm-plat-k3/core/tee-pager_v2.bin O=/tmp/a53
 
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