The first line below applies to you so that you can get out of the bootloop and into the AP Fastboot mode which will then allow you to run the Droid RAZR Utility and with option 1, flash the Fastboot ROM to restore your phone. The rest is for getting it to charge...
I came across a unique technique that actually works, posted by another member.
Originally Posted by spc_hicks09
1. Press and hold vol down and power, when the screen flickers, release buttons and quickly press and hold all 3 side buttons (power, vol up, vol down). Once screen awakes with a white text on black menu, release the three buttons.
[HALEY!! This will take the phone into the Boot Mode Selection Menu (where AP Fastboot is). Once there, press the Volume Down ONLY TWICE, then press the Volume UP only ONCE. This takes you to the AP Fastboot mode. Now you're ready for the Droid RAZR Utility. You must have sufficient battery power to complete the AP Fastboot flashing, so you may want to follow steps below or at the very bottom, and then come back here once fully charged. It's recommended that you have at least 50% (some say 70%) of battery capacity before starting.]2. Plug in the wall charger (not usb)
3. Use vol down to highlight the SBF Flash Option
4. Use vol up to select it
5. Press and hold the power button for about 3 seconds then release.
Now the phone should power down completely after a couple seconds and begin charging (you should see the battery charging icon). If it doesn't work the first time just keep trying, took me a couple tries before it started charging but it worked. It also helps to boot into the stock recovery and do a factory reset first. It works though.
I verified this works!
Here's another method as well;
This works with the wall charger only!!!!!
Shut off the phone (get into fastboot and just hit the power button to shutdown).
While holding down the + and - volume buttons, plug in wall charger.
Scroll down with the volume - button to bp tools and then push volume +.
The phone will show the motorola logo and then show the battery image filling up as it charges.
Wait awhile for it to charge up.