beckham: Use decimal values for partitions sizes

* Vendor apparently can't use hex values, so just use
  decimal values for all partitions.

Change-Id: I8f0da77075a03ab25b84fe311f70691a6bb5d758
Signed-off-by: Joshua Blanchard <joshua.lee.bbg@gmail.com>

BoardConfig.mk

@@ -35,8 +35,8 @@ TARGET_KERNEL_CONFIG := lineageos_beckham_defconfig
 BOARD_NFC_CHIPSET := pn553
 
 # Partitions
-BOARD_BOOTIMAGE_PARTITION_SIZE := 0x04000000
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 0xBE000000
+BOARD_BOOTIMAGE_PARTITION_SIZE := 67108864
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 3187671040
 BOARD_VENDORIMAGE_PARTITION_SIZE := 939524096
 
 # Power