Adapted nvmc so it can be used for all nrf targets

embassy-nrf/src/chips/nrf5340_net.rs

@@ -104,6 +104,8 @@ pub mod pac {
 pub const EASY_DMA_SIZE: usize = (1 << 16) - 1;
 pub const FORCE_COPY_BUFFER_SIZE: usize = 1024;
 
+pub const FLASH_SIZE: usize = 256 * 1024;
+
 embassy_hal_common::peripherals! {
     // RTC
     RTC0,
@@ -112,6 +114,9 @@ embassy_hal_common::peripherals! {
     // WDT
     WDT,
 
+    // NVMC
+    NVMC,
+
     // UARTE, TWI & SPI
     UARTETWISPI0,
     UARTETWISPI1,