stmhal/boards/stm32f405.ld: Increase FLASH_TEXT to end of 1MiB flash.

And and FLASH_FS, and use "K" values instead of hex numbers for lengths.

The increase of FLASH_TEXT is to allow more frozen bytecode for a
particular user's project.  It's not used for anything else.

stmhal/boards/stm32f405.ld

@@ -5,11 +5,12 @@
 /* Specify the memory areas */
 MEMORY
 {
-    FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 0x100000 /* entire flash, 1 MiB */
-    FLASH_ISR (rx)  : ORIGIN = 0x08000000, LENGTH = 0x004000 /* sector 0, 16 KiB */
-    FLASH_TEXT (rx) : ORIGIN = 0x08020000, LENGTH = 0x080000 /* sectors 5,6,7,8, 4*128KiB = 512 KiB (could increase it more) */
-    CCMRAM (xrw)    : ORIGIN = 0x10000000, LENGTH = 0x010000 /* 64 KiB */
-    RAM (xrw)       : ORIGIN = 0x20000000, LENGTH = 0x020000 /* 128 KiB */
+    FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 1024K /* entire flash */
+    FLASH_ISR (rx)  : ORIGIN = 0x08000000, LENGTH = 16K /* sector 0 */
+    FLASH_FS (rx)   : ORIGIN = 0x08004000, LENGTH = 112K /* sectors 1,2,3,4 are for filesystem */
+    FLASH_TEXT (rx) : ORIGIN = 0x08020000, LENGTH = 896K /* sectors 5,6,7,8,9,10,11 */
+    CCMRAM (xrw)    : ORIGIN = 0x10000000, LENGTH = 64K
+    RAM (xrw)       : ORIGIN = 0x20000000, LENGTH = 128K
 }
 
 /* produce a link error if there is not this amount of RAM for these sections */