arm64: dts: ti: Makefile: Fix typo "k3-j7200-evm-pcie1-ep.dtbo"

arm64: dts: ti: Makefile: Fix typo "k3-j7200-evm-pcie1-ep.dtbo"

The list of "dtbs" should contain the resultant "dtb" formed by applying
the "dtbo" overlay on the base "dtb", rather than the "dtbo" itself.

Hence, change "k3-j7200-evm-pcie1-ep.dtbo" to "k3-j7200-evm-pcie1-ep.dtb"
in the list of "dtbs".

Fixes: f43ec89bbc83 ("arm64: dts: ti: k3-j7200-evm: Add overlay for PCIE1 Endpoint Mode")
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Link: https://lore.kernel.org/r/20241205105041.749576-2-s-vadapalli@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>