echoplayer: don't wake LCD automatically in bootloader

Normally the bootloader won't enable the LCD, but we
still want to call lcd_init() at startup to keep the
code simple.

Change-Id: I866ecd7c81b6c5e6acdd57f5d7680400df3f54f4

firmware/target/arm/stm32/echoplayer/lcd-echoplayer.c

@@ -215,8 +215,10 @@ void lcd_init_device(void)
     stm_spi_init(&spi, &spi_cfg);
     nvic_enable_irq(NVIC_IRQN_SPI5);
 
+#ifndef BOOTLOADER
     /* Enable LTDC and LCD controller */
     wake_lcd();
+#endif
 }
 
 bool lcd_active(void)