Revert "snippets: sdp: mspi: remove unused pins configuration"

This reverts commit 5b0c9b0.

Signed-off-by: Marcin Szymczyk <marcin.szymczyk@nordicsemi.no>

Author: masz-nordic

snippets/sdp/mspi/soc/nrf54l15_cpuapp.overlay

@@ -80,6 +80,8 @@
 			psels = <NRF_PSEL(SDP_MSPI_SCK, 2, 1)>,
 				<NRF_PSEL(SDP_MSPI_DQ0, 2, 2)>,
 				<NRF_PSEL(SDP_MSPI_DQ1, 2, 4)>,
+				<NRF_PSEL(SDP_MSPI_DQ2, 2, 3)>,
+				<NRF_PSEL(SDP_MSPI_DQ3, 2, 0)>,
 				<NRF_PSEL(SDP_MSPI_CS0, 2, 5)>;
 			nordic,drive-mode = <NRF_DRIVE_S0S1>;
 		};
@@ -89,6 +91,8 @@
 			psels = <NRF_PSEL(SDP_MSPI_SCK, 2, 1)>,
 				<NRF_PSEL(SDP_MSPI_DQ0, 2, 2)>,
 				<NRF_PSEL(SDP_MSPI_DQ1, 2, 4)>,
+				<NRF_PSEL(SDP_MSPI_DQ2, 2, 3)>,
+				<NRF_PSEL(SDP_MSPI_DQ3, 2, 0)>,
 				<NRF_PSEL(SDP_MSPI_CS0, 2, 5)>;
 			low-power-enable;
 		};