The ECB raised the amount of emergency liquidity available to Greek banks, while signaling that access to such funds may become more difficult if bailout talks remain deadlocked.  The Governing Council lifted the cap on Emergency Liquidity Assistance by €1.4B ($1.5B) to €76.9B, according to leakers.  That follows an increase of about €1.5B last week.  With no speedy deal between Greece & its creditors in sight, the ECB is studying measures to rein in ELA funding to limit risks.  Staff have proposed increasing the discounts imposed on the securities banks post as collateral when borrowing, & the Governing Council may discuss the issue at its May 6 meeting.  Household & business deposits fell €1.9B in Mar to €138.6B, the lowest level since Jan 2005, according to Bank of Greece data.  Weekly ELA injections reflect deposit outflows, as liquidity buffers are kept at about €3B to give the Bank of Greece & the ECB time to react in an emergency.  Mar deposit outflows bring the 4-month drop to almost €26B, or about 16% of the total, amid growing alarm among savers over the country’s place in the euro area.  While the rate of decline has slowed, outflows probably continued into Apr, as reflected by successive ELA-ceiling increases.  ECB help to Greek banks “can’t continue indefinitely,” Governing Council member Christian Noyer said.  “What’s needed are decisions on fundamental reforms.