arm64: dts: ti: k3-j721e-main: Fix "bus-range" upto 256 bus number for PCIe

commit 4e583388 ("arm64: dts: ti: k3-j721e-main: Add PCIe device
tree nodes") restricted PCIe bus numbers from 0 to 15 (due to SMMU
restriction in J721E). However since SMMU is not enabled, allow the full
supported bus numbers from 0 to 255.

Fixes: 4e583388 ("arm64: dts: ti: k3-j721e-main: Add PCIe device tree nodes")
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20210915055358.19997-3-kishon@ti.com