add board architecture specific init defaults

platforms/nuttx/init/imxrt/rc.board_arch_defaults

@@ -0,0 +1,6 @@
+#!/bin/sh
+#
+# imxrt specific defaults
+#------------------------------------------------------------------------------
+
+set LOGGER_BUF 32

platforms/nuttx/init/kinetis/rc.board_arch_defaults

@@ -0,0 +1,18 @@
+#!/bin/sh
+#
+# Kinetis specific defaults
+#------------------------------------------------------------------------------
+
+# Multi-EKF (off by default)
+param set-default EKF2_MULTI_IMU 0
+param set-default SENS_IMU_MODE 1
+param set-default EKF2_MULTI_MAG 0
+param set-default SENS_MAG_MODE 1
+
+set LOGGER_BUF 12
+
+if param greater -s UAVCAN_ENABLE 1
+then
+	# Reduce logger buffer to free up some RAM for UAVCAN servers.
+	set LOGGER_BUF 4
+fi

platforms/nuttx/init/s32k1xx/rc.board_arch_defaults

@@ -0,0 +1,12 @@
+#!/bin/sh
+#
+# S32K1XX specific defaults
+#------------------------------------------------------------------------------
+
+set LOGGER_BUF 12
+
+if param greater -s UAVCAN_ENABLE 1
+then
+	# Reduce logger buffer to free up some RAM for UAVCAN servers.
+	set LOGGER_BUF 4
+fi

platforms/nuttx/init/stm32/rc.board_arch_defaults

@@ -0,0 +1,18 @@
+#!/bin/sh
+#
+# STM32 (STM32F4) specific defaults
+#------------------------------------------------------------------------------
+
+# Multi-EKF (off by default)
+param set-default EKF2_MULTI_IMU 0
+param set-default SENS_IMU_MODE 1
+param set-default EKF2_MULTI_MAG 0
+param set-default SENS_MAG_MODE 1
+
+set LOGGER_BUF 12
+
+if param greater -s UAVCAN_ENABLE 1
+then
+	# Reduce logger buffer to free up some RAM for UAVCAN servers.
+	set LOGGER_BUF 4
+fi

platforms/nuttx/init/stm32f7/rc.board_arch_defaults

@@ -0,0 +1,14 @@
+#!/bin/sh
+#
+# STM32F7 specific defaults
+#------------------------------------------------------------------------------
+
+# Multi-EKF (across IMUs only)
+param set-default EKF2_MULTI_IMU 3
+param set-default SENS_IMU_MODE 0
+param set-default EKF2_MULTI_MAG 0
+param set-default SENS_MAG_MODE 1
+
+param set-default UAVCAN_ENABLE 2
+
+set LOGGER_BUF 64

platforms/nuttx/init/stm32h7/rc.board_arch_defaults

@@ -0,0 +1,14 @@
+#!/bin/sh
+#
+# STM32H7 specific defaults
+#------------------------------------------------------------------------------
+
+# Multi-EKF
+param set-default EKF2_MULTI_IMU 3
+param set-default SENS_IMU_MODE 0
+param set-default EKF2_MULTI_MAG 3
+param set-default SENS_MAG_MODE 0
+
+param set-default UAVCAN_ENABLE 2
+
+set LOGGER_BUF 64