boards: renesas: dts: Various fixes

This commit should deal with fixing
various issues on the board's dts
overlay files:

1. PSRAM node was not enabled when
   display buffers were stored in
   psram and thus, raising linker
    error (overflow memory section).

2. Remove MIPI DBI read operations
   for the MIPI DBI driver. This is
   because not all drivers support
   read and most of the cases it does
   not have any practical usage.
   In addition, this might trigger
   conflicts with SPI sensors.
   If needed, users should explicitly
   enable read operations by defining
   an SPI device taking into consideration
   conflicts with SPI devices connected
   to the SPI bus.

3. Remove enabling the DMA driver.
   It should be enabled by default.

Signed-off-by: Ioannis Karachalios <ioannis.karachalios.px@renesas.com>

boards/renesas/da1469x_dk_pro/dts/da1469x_dk_pro_lcdc.overlay

@@ -19,10 +19,6 @@
     };
 };
 
-&dma {
-    status = "okay";
-};
-
 &pinctrl {
     i2c2_default: i2c2_default {
         group1 {

boards/renesas/da1469x_dk_pro/dts/da1469x_dk_pro_mipi_dbi.overlay

@@ -33,15 +33,10 @@
     };
 };
 
-&spi2 {
-    status = "okay";
-};
-
 &lcdc {
     compatible = "renesas,smartbond-mipi-dbi";
     status = "okay";
     reset-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
-    spi-dev = <&spi2>;
     pinctrl-0 = <&mipi_dbi_default>;
     pinctrl-1 = <&mipi_dbi_read>;
     pinctrl-2 = <&mipi_dbi_sleep>;

boards/renesas/da1469x_dk_pro/dts/da1469x_dk_pro_psram.overlay

@@ -10,6 +10,10 @@
 	};
 };
 
+&psram {
+	status = "okay";
+};
+
 /* QSPIC settings for the APS6404L-3SQR QSPI PSRAM memory in QPI mode. */
 &memc {
 	status = "okay";

drivers/mipi_dbi/Kconfig.smartbond

@@ -7,6 +7,5 @@ config MIPI_DBI_SMARTBOND
 	bool "Smartbond MIPI DBI host controller driver"
 	depends on DT_HAS_RENESAS_SMARTBOND_MIPI_DBI_ENABLED
 	default y
-	select SPI
 	help
 	  Enable Smartbond MIPI DBI host controller.