Update SDK to 0.2.1-12

Next try, superseding https://git.card10.badge.events.ccc.de/card10/firmware/-/merge_requests/372

epicardium/modules/hardware.c

@@ -96,13 +96,11 @@ int hardware_early_init(void)
 	/*
 	 * SPI for ECG
 	 */
-	const sys_cfg_spi_t spi17y_master_cfg = {
-		.map = MAP_A,
-		.ss0 = Enable,
-		.ss1 = Disable,
-		.ss2 = Disable,
-		.num_io = 2
-	};
+	const sys_cfg_spi_t spi17y_master_cfg = { .map    = MAP_A,
+						  .ss0    = Enable,
+						  .ss1    = Disable,
+						  .ss2    = Disable,
+						  .num_io = 2 };
 
 	if (SPI_Init(SPI0, 0, SPI_SPEED, spi17y_master_cfg) != 0) {
 		LOG_ERR("init", "Error configuring SPI");