qrb2210-rb1: Reduce size of boot partitions

Given the UEFI boot requirement, the boot partition is only meant to
support U-Boot chainloaded from ABL. The traditional Linux android boot
image is no longer required to support booting Yocto, so let's optimize
for size and give more flash space available for the user.

4MB is choosen as maximum limit for U-Boot image size since with more
UEFI features enabled like secure boot etc. the size can cross 2MB
limit.

Signed-off-by: Sumit Garg <[email protected]>

Author: b49020

platforms/qrb2210-rb1/partitions.conf

@@ -30,8 +30,8 @@
 --partition --name=rpm_b --size=512KB --type-guid=77036CD4-03D5-42BB-8ED1-37E5A88BAA34 --filename=rpm.mbn
 --partition --name=hyp_a --size=512KB --type-guid=E1A6A689-0C8D-4CC6-B4E8-55A4320FBD8A --filename=hyp.mbn
 --partition --name=hyp_b --size=512KB --type-guid=77036CD4-03D5-42BB-8ED1-37E5A88BAA34 --filename=hyp.mbn
---partition --name=boot_a --size=98304KB --type-guid=20117F86-E985-4357-B9EE-374BC1D8487D --filename=boot.img
---partition --name=boot_b --size=98304KB --type-guid=77036CD4-03D5-42BB-8ED1-37E5A88BAA34 --filename=boot.img
+--partition --name=boot_a --size=4096KB --type-guid=20117F86-E985-4357-B9EE-374BC1D8487D --filename=boot.img
+--partition --name=boot_b --size=4096KB --type-guid=77036CD4-03D5-42BB-8ED1-37E5A88BAA34 --filename=boot.img
 --partition --name=keymaster_a --size=512KB --type-guid=A11D2A7C-D82A-4C2F-8A01-1805240E6626 --filename=km4.mbn
 --partition --name=keymaster_b --size=512KB --type-guid=77036CD4-03D5-42BB-8ED1-37E5A88BAA34 --filename=km4.mbn
 --partition --name=mdtpsecapp_a --size=4096KB --type-guid=EA02D680-8712-4552-A3BE-E6087829C1E6