power: msm-battery: Report USB WALL charger as MAINS supply-type
power: msm-battery: Report USB WALL charger as MAINS supply-type

USB wall charger falls under the category of a dedicated wall
charger. Categorize it as a type of MAINS power supply.

CRs-Fixed: 429508
Change-Id: I1ba3ace8836aa4b094b8454fb78e24ea66c826ff
Signed-off-by: Anirudh Ghayal <6965a7b3a67807f737dfd71d68e54d27340a5c95@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas