Fixes after reviewer's comment

- Fix misnamed STM32U585 register
- Remove emu-test-apps linker scripts as they are autogenerated

Author: danielinux

.gitignore

@@ -304,3 +304,6 @@ language.settings.xml
 
 # PolarFire SoC Device Tree Binary
 hal/mpfs.dtb
+
+# Emulator test: generated linker scripts
+test-app/emu-test-apps/*/target.ld

hal/stm32u5.c

@@ -502,7 +502,7 @@ static void periph_unsecure(void)
     RCC_AHB2ENR1_CLOCK_ER |= GPIOD_AHB2ENR1_CLOCK_ER;
 
     /* Enable clock for USART3 */
-    RCC_APB1LENR |= (1u << 18);
+    RCC_APB1ENR |= (1u << 18);
 
     /* Unsecure USART3 pins (PD8 TX, PD9 RX) */
     GPIOD_SECCFGR &= ~(1u << 8);

hal/stm32u5.h

@@ -120,7 +120,7 @@
 #define RCC_AHB3ENR             (*(volatile uint32_t *)(RCC_BASE + 0x94)) /* RM0456 - Table 108 */
 #define RCC_AHB3ENR_GTZC2EN     (1 << 12)
 
-#define RCC_APB1LENR            (*(volatile uint32_t *)(RCC_BASE + 0x9C)) /* RM0456 - Table 108 */
+#define RCC_APB1ENR             (*(volatile uint32_t *)(RCC_BASE + 0x9C)) /* RM0456 - Table 108 */
 #define RCC_AHB3ENR_PWREN       (1 << 2)
 
 #define RCC_ICSCR1             (*(volatile uint32_t *)(RCC_BASE + 0x08))