arm64: dts: qcom: apq8096-db820c: drop SPI label

The SPI controller nodes do not use/allow label property:

  apq8096-db820c.dtb: spi@7575000: Unevaluated properties are not allowed ('label' was unexpected)
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230308125906.236885-5-krzysztof.kozlowski@linaro.org

arch/arm64/boot/dts/qcom/apq8096-db820c.dts

@@ -146,7 +146,6 @@ &blsp1_i2c3 {
 
 &blsp1_spi1 {
 	/* On Low speed expansion */
-	label = "LS-SPI0";
 	status = "okay";
 };
 
@@ -183,7 +182,6 @@ &blsp2_i2c1 {
 
 &blsp2_spi6 {
 	/* On High speed expansion */
-	label = "HS-SPI1";
 	status = "okay";
 };