[EFM32] Small fixes

* Use mbed_error
* Include cmsis headers by default when grabbing device.h
* Get rid of enum to uint casting in pinmap

Author: stevew817

targets/TARGET_Silicon_Labs/TARGET_EFM32/analogout_api.c

@@ -25,7 +25,7 @@
 #if DEVICE_ANALOGOUT
 
 #include "mbed_assert.h"
-#include "error.h"
+#include "mbed_error.h"
 #include "analogout_api.h"
 #include "pinmap.h"
 #include "pinmap_function.h"

targets/TARGET_Silicon_Labs/TARGET_EFM32/common/device.h

@@ -23,6 +23,7 @@
 #ifndef MBED_DEVICE_H
 #define MBED_DEVICE_H
 
+#include "cmsis.h"
 #include "objects.h"
 #include "device_peripherals.h"
 

targets/TARGET_Silicon_Labs/TARGET_EFM32/common/error.h

@@ -35,7 +35,7 @@ void pin_function(PinName pin, int function)
 
 void pin_mode(PinName pin, PinMode mode)
 {
-    MBED_ASSERT((0xFFFFFF00 |pin) != NC);
+    MBED_ASSERT(pin != NC);
 
     /* Enable GPIO clock if not already done */
     if (!gpio_clock_inited) {

targets/TARGET_Silicon_Labs/TARGET_EFM32/pinmap.c

@@ -23,7 +23,7 @@
 
 #include "pinmap_function.h"
 #include "PinNames.h"
-#include "error.h"
+#include "mbed_error.h"
 
 /**
  * Get the value of the function field for a pin in a pinmap

targets/TARGET_Silicon_Labs/TARGET_EFM32/pinmap_function.c

@@ -27,7 +27,6 @@
 
 #include "mbed_assert.h"
 #include "pwmout_api.h"
-#include "cmsis.h"
 #include "pinmap.h"
 #include "PeripheralPins.h"
 #include "device_peripherals.h"

targets/TARGET_Silicon_Labs/TARGET_EFM32/pwmout_api.c

@@ -26,7 +26,6 @@
 
 #include "sleep_api.h"
 #include "sleepmodes.h"
-#include "cmsis.h"
 #include "em_emu.h"
 #include "critical.h"
 

targets/TARGET_Silicon_Labs/TARGET_EFM32/sleep.c

@@ -29,7 +29,7 @@
 #include "PeripheralPins.h"
 #include "pinmap.h"
 #include "pinmap_function.h"
-#include "error.h"
+#include "mbed_error.h"
 
 #include "dma_api.h"
 #include "dma_api_HAL.h"

targets/TARGET_Silicon_Labs/TARGET_EFM32/spi_api.c

@@ -23,12 +23,10 @@
 
 #include <stddef.h>
 #include "us_ticker_api.h"
-#include "cmsis.h"
+#include "device.h"
 #include "mbed_assert.h"
 #include "em_cmu.h"
 #include "em_timer.h"
-#include "device_peripherals.h"
-#include "device.h"
 #include "clocking.h"
 #include "sleep_api.h"
 #include "sleepmodes.h"