Fix the unfortunate off-by-one.

Fixes: 721e3830 ("arm64: dts: qcom: x1e80100: Add gpu support")
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20240716-topic-h_bits-v1-1-f6c5d3ff982c@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>